Unit 5 第4课时 Section A 4a—4d-【七彩课堂】2025-2026学年八年级英语下册同步课件（人教版）

Section A 4a—4d Unit 5 Nature’s Temper Objectives To understand how to use “when” and “while” and the difference between them. To combine sentences using “when” or “while”. To describe things that people do during the typhoons. 2 Read the sentences. Underline the verbs which show an ongoing action in the past. 4a What were you doing while it was snowing heavily? I was travelling on the train then. What were your family doing when the typhoon hit? My children and I were reading together. When my neighbour called, my family were having dinner. We were driving home when the strong winds started. While we were driving home, the strong winds started. It was raining hard while we were driving back. Grammar Focus Combine each pair of sentences using when or while. 4b 1. I did my homework. The typhoon landed on the coast.   2. The power went out. My father and I made dinner.    3. Kate wrote a letter. Her brother called to warn her of the storm.   4. My parents packed the supplies. I moved our things off the floor.   5. I slept soundly. It rained cats and dogs. n. 电力供应 adv. （睡觉）酣畅地 辨析： when & while when既可以表示一个时间点，也可以表示一个时间段。 从句的动词既可以是短暂性动词（如：arrive, start, finish, open等），也可以是延续性动词（如：stay, live, work等）。 主句动作可以发生在从句动作的“瞬间”，也可以是同时或先后。 while主要表示一个时间段（持续的、进行的一段时间）。 从句的动词必须是延续性动词（如：be, stay, work, sleep等）或表示状态的词。从句常用进行时态。 强调主句和从句动作“同时持续”发生，或在从句动作的“持续期间内”发生主句动作。 例句： I was watching TV when the light went out. 我正在看电视，这时灯灭了。（ “灯灭”是短暂性动词） 例句： While I was studying, my brother was playing games. 我在学习时，我弟弟在玩游戏。（两个动作都在持续） I did my homework. The typhoon landed on the coast. 2. The power went out. My father and I made dinner.    3. Kate wrote a letter. Her brother called to warn her of the storm.   I was doing my homework when the typhoon landed on the coast. My father and I were making dinner when the power went out. Kate was writing a letter when her brother called to warn her of the storm. 4. My parents packed the supplies. I moved our things off the floor.   5. I slept soundly. It rained cats and dogs.   While my parents were packing the supplies, I was moving our things off the floor. I was sleeping soundly while it was raining cats and dogs. Complete the passage with was, were, when, or while. 4c When Jenny looked up, thick black clouds were forming in the sky, and the rain _________ beating against their roof.  “Quick, this way,” said Dad.  The family ran to the safe room at once. _________ they were waiting, Jenny’s little sister started to cry. Dad gave her some chocolate and told her that they _________ hiding from an angry lion. Soon, she was laughing again.  adj. 厚的；浓密的 v. 敲；打 v. 躲藏；隐蔽 start to do sth 开始做某事 was While were At last, the storm passed. _________ they stepped outside, they found the sun shining. People were asking one another if they were safe while some _________ starting to clear the streets. Jenny smiled. The tornado was scary, but it also brought everyone closer together. n. 龙卷风；旋风 When were A: What were you doing when the tornado hit?  B: My family and I were hiding in a safe room.  A: What were you doing while you were waiting there? B: Oh, while I … Imagine that you are a reporter. Interview a member of Jenny’s family and find out what he or she was doing around the time of the tornado. 4d 例如： A: What were you doing when the tornado hit?  B: My family and I were hiding in a safe room.  A: What were you doing while you were waiting there? B: Oh, while I was waiting there, I started to cry. Then Dad gave me some chocolate and told me that we were hiding from an angry lion. Soon, I laughed again. Language Points 1. power /ˈpaʊə(r)/ n. 电力供应；能量；力量 例句： The storm caused a power failure. 暴风雨导致停电。   Many countries are switching to renewable power. 许多国家正在转向可再生能源。 power指电能或动力来源。 例句： He has great strength, but no political power.  他有强壮的肌肉力量，但没有政治权力。 辨析： power与strength power：用词广泛，可指能力、权力、能源等。 strength：通常指身体或物体的力量（如肌肉力量、材料强度）。 2. go out （火、灯等）熄灭 例句： The fire went out because there was no more wood. 因为没木头了，火灭了。  All the lights in the building went out during the storm. 暴风雨期间，大楼里所有的灯都灭了。 go out指火焰、灯光等停止燃烧或发光，相当于“stop burning/shining”。 3. soundly /ˈsaʊndli/ adv. （睡觉）酣畅地 例句： The baby is sleeping soundly. 宝宝正在熟睡。 拓展： soundly作副词，还有“可靠地；完全彻底地”的意思。 例句： Our team was soundly defeated in the match. 我们队在比赛中被彻底击败了。 4. thick /θɪk/ adj. 厚的；浓密的 thick的反义词为thin，意为“薄的；稀的”。 例句： The plane crashed in thick fog. 飞机在大雾中坠毁。  They’re two feet thick. 它们有两英尺厚。 拓展： thick还可意为“茂密的；密集的”“粗的；粗壮的”。 例句： We walked through a thick forest where sunlight could hardly get in. 我们穿过一片茂密的森林，阳光几乎照不进来。  The garden is full of thick bushes.   花园里长满了茂密的灌木丛。 5. beat /biːt/ v. 敲；打 beat常与at/against/on等词连用。beat还可意为“（心脏、脉搏等）跳动”。 例句： Somebody was beating at the door. 有人在敲门。  She’s alive—her heart is still beating.  她没死——她的心脏还在跳动。 拓展： beat还可以作名词，意为“敲击；跳动”。 例句： I hear the steady beat of the drums. 我听到了有节奏的敲鼓声。 He could hear the beat of his heart. 他能听到自己的心跳。 辨析： beat与win 例句： We played very well, and we beat them.   我们发挥很好，打败了他们。  He won the first prize in the surfing competition. 他在冲浪比赛中获得了第一。 beat win 充当beat的宾语通常是比赛或竞争对手，即指人或球队的名词或代词 充当win的宾语通常是比赛、战争、奖品、金钱等名词，即race、match、game、competition、war、 prize之类的词 短语： beat against （反复地、用力地）拍打、撞击在 …… 上 beat against 强调动作的持续性和冲击力，常用来描述自然现象（如风、雨、浪等）或物体在外力作用下反复撞击另一物体的情景。 例句： The rain beat against the roof all night.   雨水整夜不停地拍打屋顶。  Strong winds made the branches beat against the window. 狂风使树枝不停地拍打窗户。 I. 根据汉语提示，补全句子。 当我遇到困难时，这些瞬间会给我力量。 When I am in trouble, these moments can give me ________. 卧室的灯片刻后熄灭了。 The bedroom light ________ after a moment.  她睡得正香。 She is sleeping ________. power Exercises went out soundly II. 请用 when 或 while 填空。 1. I was reading a book ______ the phone rang. 2. ______ I was reading a book, my sister was watching TV. 3. He fell asleep ______ he was listening to music. 4. ______ I arrived home, it started to rain heavily. 5. Please don’t talk so loudly ______ others are working. 6. What were you doing ______ the teacher came in? 7. ____________ I lived in the countryside, I learned a lot about farming. when While while When while when When/While Homework Use "when" and "while" to make three sentences each. 2. Describe things that Jenny’s family do during the typhoons. 3. Master the words in this lesson and preview next part. 伴你成长 感谢您的观看 $