Unit 4 Safety first Lesson3 Grammar time（课件）-2026-2027学年译林版（三起）英语五年级上册

该小学英语课件聚焦“should/shouldn't + 动词原形”语法点，通过回顾Story Time安全建议句，对比U1-U3动词第三人称单数变化（如He likes running）与U4 should+原形用法，构建知识脉络，为学生提供学习支架。 其亮点在于设计多样化活动，如安全行为分类、闪卡复习、快速反应游戏及小组制作安全海报，结合语言能力（用should/shouldn't表达建议）、思维品质（分析安全与危险行为）和学习能力（合作实践）。例如小组合作完成“Let's keep safe at school!”海报，填充should/shouldn't句子，既提升语法运用能力又强化安全意识，教师可通过丰富活动提高教学效率。

Unit 4 Safety first Lesson 3 · Grammar Time: should / shouldn't Stay safe, stay happy! 译林版五年级上册 Unit 4 · Safety first 1/30 Learning Objectives Discover I can find the rule: should / shouldn't + base form. Grammar I can use should/shouldn't to give safety advice for all subjects. Practice I can complete Part A and make a safety poster. Think I can talk about what we should/shouldn't do to keep safe. Unit 4 · Safety first 2/30 Review: Story Time Sentences FROM P2 STORY TIME We should walk on the stairs. We shouldn't push. We should warm up first. We shouldn't run in the classroom. FROM U1-U3 (Compare!) U1: He likes running. (V+s) U2: He does not like running. (does not + V) U3: Does he like running? (Does + V) T: We can give safety advice with should/shouldn't. But WHY? Today: Grammar Time! WHOLE CLASS Unit 4 · Safety first 3/30 Big Question We can say: "We should walk on the stairs." But HOW does "should" work? Let's find out! What should you do to keep safe? 你应该怎么做来保持安全？ T: Today we learn should/shouldn't to give safety advice. THINK & SHARE Unit 4 · Safety first 4/30 Grammar Discovery What do you notice about should and shouldn't? SHOULD (SAFE ✓) We should run on the sports ground. We should warm up first. should = good advice (safe) SHOULDN'T (DANGEROUS ✗) We shouldn't run in the classroom. We shouldn't push. shouldn't = don't do it (dangerous) ✓ Both use should or shouldn't + the SAME verb form! ✓ The verb is always the base form — run, not runs or running! T: should for safe, shouldn't for dangerous. Both + base form! THINK & SHARE Unit 4 · Safety first 5/30 Read and Learn: should (Affirmative) PART A · EXAMPLE 1 We should run on the sports ground. ✓ Running on the sports ground is SAFE. So we use should. THREE KEY POINTS ✓ should = it is a good idea (advice). ✓ should + run — run is the base form! ✓ should is the same for all subjects. T: We SHOULD run on the sports ground. should + run (base form)! WHOLE CLASS Unit 4 · Safety first 6/30 Read and Learn: shouldn't (Negative) PART A · EXAMPLE 2 We shouldn't run in the classroom. ✗ Running in the classroom is DANGEROUS. So we use shouldn't. THREE KEY POINTS ✓ shouldn't = should not (contraction). ✓ shouldn't + run — still the base form! ✓ shouldn't = don't do it (negative advice). T: We SHOULDN'T run in the classroom. shouldn't = should not + base form! WHOLE CLASS Unit 4 · Safety first 7/30 Compare: should Doesn't Change Look at all these subjects. Does "should" change? I should warm up first. We should walk on the stairs. You should be careful. They should follow the rules. He should wear a helmet. She shouldn't push others. should is the SAME for I, We, You, They, He, She! No -s on should! No -s on the verb! THINK & SHARE Unit 4 · Safety first 8/30 Rule 1: should + Base Form should + V (base form) After should, always use the base form — not V-ing, not to + V! CORRECT ✓ ✓ should run ✓ should walk ✓ should warm up ✓ shouldn't push ✓ shouldn't pull WRONG ✗ ✗ should running (not V-ing!) ✗ should to run (not to + V!) ✗ should runs (no -s!) ✗ shouldn't pushing (not V-ing!) ✗ shouldn't to push (not to + V!) T: should + RUN, not running! Not to run! Always base form! WHOLE CLASS Unit 4 · Safety first 9/30 Rule 2: shouldn't = should not shouldn't = should not (contraction) shouldn't是should not的缩写形式 USE SHOULDN'T FOR: ✗ Dangerous actions ✗ Bad habits ✗ Things NOT to do Examples: We shouldn't push. He shouldn't pull clothes. SPELLING CHECK ✓ shouldn't (correct) ✗ shouldnot (no space!) ✗ shoudn't (missing l!) ✗ should'nt (wrong ' !) s-h-o-u-l-d-n-'-t Watch the apostrophe! T: shouldn't = should not. Watch the spelling: s-h-o-u-l-d-n-'-t! WHOLE CLASS Unit 4 · Safety first 10/30 Rule 3: should for All Subjects I / We / You / They / He / She + should + V should NEVER changes — no -s for any subject! I should warm up. We should walk on the stairs. You should be careful. They should follow the rules. He should wear a helmet. She shouldn't push others. He should run — NOT He shoulds run! He should run — NOT He should runs! T: should is the same for everyone! No -s anywhere! WHOLE CLASS Unit 4 · Safety first 11/30 Rule 4: Compare with U1-U3 The BIG difference: should vs. third person singular U1-U3: VERB CHANGES U1: He likes running. → likes has -s (V+s) U2: He does not like running. → does not + like (base) U3: Does he like running? → Does + like (base) Verb changes with subject! U4: SHOULD — NO CHANGE He should run. → should + run (base form) She should walk. → should + walk (base form) He shouldn't push. → shouldn't + push (base) Nothing changes! should + V! T: U1 "He likes" has -s. U4 "He should run" — NO -s! should is a modal verb! THINK & SHARE Unit 4 · Safety first 12/30 Consolidation: Sort the Actions Sort these actions: should (safe) or shouldn't (dangerous)? SHOULD ✓ (SAFE) ✓ should run on the sports ground ✓ should walk on the stairs ✓ should warm up first ✓ should be careful ✓ should follow the rules SHOULDN'T ✗ (DANGEROUS) ✗ shouldn't run in the classroom ✗ shouldn't push others ✗ shouldn't pull clothes ✗ shouldn't jump in the classroom ✗ shouldn't play with fire All use should/shouldn't + base form! QUICK CHECK Unit 4 · Safety first 13/30 Flash Card Review — should / shouldn't CARD 1 We should walk on the stairs. ✓ Safe CARD 2 We shouldn't push. ✗ Dangerous CARD 3 We should warm up first. ✓ Safe CARD 4 We shouldn't run in the classroom. ✗ Dangerous CARD 5 He should wear a helmet. ✓ Safe CARD 6 She shouldn't push others. ✗ Dangerous CARD 7 They should follow the rules. ✓ Safe CARD 8 You should be careful. ✓ Safe T: Read each card! should = safe, shouldn't = dangerous. All + base form! QUICK CHECK Unit 4 · Safety first 14/30 Read and Complete: Part A (1-2) Complete the sentences (click to reveal answers →) 1. We ___ jump on the sports ground. 2. We ___ jump in the classroom. ✓ 1. We should jump on the sports ground. ✓ 2. We shouldn't jump in the classroom. T: #1 safe → should. #2 dangerous → shouldn't. Both + jump (base form)! QUICK CHECK Unit 4 · Safety first 15/30 Read and Complete: Part A (3-4) Complete the sentences (click to reveal answers →) 3. He ___ pull his clothes. 4. They ___ push others. ✓ 3. He shouldn't pull his clothes. ✓ 4. They shouldn't push others. T: #3 He shouldn't (dangerous, should doesn't change for he!). #4 They shouldn't! QUICK CHECK Unit 4 · Safety first 16/30 Read and Complete: Part A (5-6) Complete the sentences (click to reveal answers →) 5. You ___ warm up first. 6. We ___ walk on the stairs. ✓ 5. You should warm up first. ✓ 6. We should walk on the stairs. T: #5 safe → should + warm up. #6 safe → should + walk. All base form! QUICK CHECK Unit 4 · Safety first 17/30 Quick Response Game I say: subject + action + safe/dangerous → You make a should/shouldn't sentence! We, walk, safe! → We should walk. He, run, dangerous! → He shouldn't run. She, jump, safe! → She should jump. They, push, dangerous! → They shouldn't push. You, warm up, safe! → You should warm up. He, pull, dangerous! → He shouldn't pull. ⚠ He should run — NOT He shoulds / He should runs! WHOLE CLASS Unit 4 · Safety first 18/30 Error Alert! WRONG ✗ ✗ He shoulds run. ✗ He should runs. ✗ We should running. ✗ We should to run. ✗ shouldnot push. CORRECT ✓ ✓ He should run. ✓ He should run. ✓ We should run. ✓ We should run. ✓ shouldn't push. T: should + RUN (not runs/running/to run)! He should (not shoulds)! shouldn't (not shouldnot)! QUICK CHECK Unit 4 · Safety first 19/30 Part B: Make a Poster PART B: MAKE A POSTER (p.52) "Let's keep safe at school!" Work in groups of four. Fill in the blanks and add your own ideas! POSTER FRAMEWORK ✓ We should warm up. ___ We shouldn't ___. ___ We shouldn't ___. ___ We should ___ on the stairs. ___ We ___. What else should and shouldn't we do to keep safe at school? T: Work in groups! Use should/shouldn't + base form to fill the poster! GROUP TALK Unit 4 · Safety first 20/30 Poster Example EXAMPLE POSTER "Let's keep safe at school!" ✓ We should warm up. ✗ We shouldn't run in the classroom. ✗ We shouldn't push. ✓ We should walk on the stairs. ✓ We should be careful in the hallway. All use should/shouldn't + base form! T: Look at the example! should for safe, shouldn't for dangerous. All + base form! GROUP TALK Unit 4 · Safety first 21/30 Poster Practice: Your Turn! Make your own poster with your group! 用should/shouldn't + 动词原形填写海报 SENTENCE FRAMES We should ___. We shouldn't ___. He/She should ___. He/She shouldn't ___. Remember: should + V! WORD BANK run walk jump push pull warm up be careful follow the rules play with fire climb the fence Places: classroom / stairs / sports ground / hallway T: Walk around and check! should + base form? should doesn't change for he/she? GROUP TALK Unit 4 · Safety first 22/30 Choose a Scene: Safety Advice Choose a school scene. Give should/shouldn't safety advice! In the classroom ✗ shouldn't run ✓ should sit properly On the stairs ✗ shouldn't push ✓ should walk On the sports ground ✗ shouldn't pull clothes ✓ should warm up In the hallway ✗ shouldn't run ✓ should be careful T: Think about each scene! What should/shouldn't we do? Use base form! THINK & SHARE Unit 4 · Safety first 23/30 Think and Share What should you do to keep safe? Tell us one thing you should do and one you shouldn't do! YOUR TURN I should ___ to keep safe. I shouldn't ___ to keep safe. Use different subjects too: He/She should ___. CONNECT TO BIG QUESTION We should walk on the stairs. We shouldn't push. He should warm up first. These keep us safe at school! Stay safe, stay happy! Safety first! T: Share with the class! What should/shouldn't you do to keep safe? THINK & SHARE Unit 4 · Safety first 24/30 Watch Out! Common Errors THREE COMMON ERRORS ERROR 1 ✗ He shoulds run → ✓ He should run should NEVER changes — not "shoulds" for he/she! ERROR 2 ✗ He should runs → ✓ He should run / ✗ We should running → ✓ We should run After should, always use the base form — not runs, not running, not to run! ERROR 3 ✗ shouldnot push → ✓ shouldn't push shouldn't = should not. Watch the spelling: s-h-o-u-l-d-n-'-t! QUICK CHECK Unit 4 · Safety first 25/30 Summary (1/2) SHOULD (AFFIRMATIVE) should + V (base form) For safe / good actions ✓ We should walk. ✓ He should warm up. SHOULDN'T (NEGATIVE) shouldn't + V (base form) For dangerous / bad actions ✗ We shouldn't push. ✗ He shouldn't pull. SHOULDN'T = SHOULD NOT shouldn't = should not Contraction (缩写形式) s-h-o-u-l-d-n-'-t Watch the apostrophe! SHOULDN'T FOR ALL SUBJECTS I/We/You/They/He/She + should should NEVER changes! ✗ He shoulds ✓ He should ✗ He should runs ✓ He should run Unit 4 · Safety first 26/30 Summary (2/2) T: Self-Check — should / shouldn't Grammar What should you do to keep safe? We should follow the rules and be careful. We shouldn't do dangerous things! ☆☆☆ I can use should + base form to give safety advice. ☆☆☆ I can use shouldn't (= should not) + base form for negative advice. ☆☆☆ I know should never changes for any subject (I/We/You/They/He/She). ☆☆☆ I can compare should + V with U1-U3 third person singular (He likes...). Key: should + V | shouldn't + V | No -s anywhere! Unit 4 · Safety first 27/30 Homework (1/2) MUST DO 1. Copy should/shouldn't rules and examples 3 times each. Use 3 colors: orange (should), red (shouldn't), blue (base form verb). 2. Read Part A (all 6 items) 3 times. Pay attention to should/shouldn't stress. Record yourself. 3. Finish 6 fill-in-the-blank sentences. Label should or shouldn't. OPTIONAL 1. Write 6 safety rules for home (at least 3 should and 3 shouldn't). Use different subjects (I/We/He/She/They/You). 2. Complete the U1-U4 comparison table: Use "He" as subject. Write U1 (He likes...), U2 (He does not...), U3 (Does he...?), U4 (He should...). Mark verb forms. Unit 4 · Safety first 28/30 Homework (2/2) — Challenge CHALLENGE Make a "My Safety Rules" card (A4 paper): Choose one scene (school / home / outdoor / sports). Write at least 5 safety rules with should/shouldn't: ✓ I should ___. ✗ I shouldn't ___. ✓ He/She should ___. Add pictures and bring it to next class! Stay safe, stay happy! Unit 4 · Safety first 29/30 See you next time! Stay safe, stay happy! 安全常伴，快乐相随！ Unit 4 · Safety first 30/30 $