牛津深圳版英语八年级上册 全单元课件 Unit 7（5份打包）

Unit 7 Memory Grammar A Conditional sentences We have already learnt to use conditional sentences to talk about probable results We can also use conditional sentences to talk about results that will certainly happen. The if-clause talks about a possible action If you put salt into water, it disappears. The main clause talks about the result that will certainly happen Work out the rule When we use a conditional sentence to talk about something that will certainly happen, both verbs should be in the simple present tense/ the simple future tense. Things to remember We can also put the if-clause after the main clause. Salt disappears if you put it into water. zxxk A1 Read these if –clauses and draw lines to match them with the results 学科网 1.If you take a fish out of water, a it grows 2. If you switch off the lamp, b it dies 3. If you put wood into water, c the room becomes dark 4. If you water a plant, d it breaks 5. If you drop a galss, e it floats A2 In pairs ,make conversations about the sentences in A1 on page 103. Following the example. S1: What happens if you take a fish out of water? S2: It dies. S1: Are you sure? S2: Of course. I am sure. If you take a fish out of water, it dies. A3. Complete these sentenses with the words in brackets. 1 If you ______ice, _________ water.( turns/ heat/ it /into) heat it turns into 2. If you ____steam, it _________ water. (into/cool/turns/ it) 3. Oil ______________________ water .(on/floats/pour/if /you/if) 4. Water __________________it (you/heat/boils/if) cool it turns into floats if you pour it on boils if you heat B if…not and unless The word unless can mean if …not. For example, the two sentences below have the same meaning: If you do not get enough sleep every night, you will not remember things well. Unless you get enough sleep every night, you will not remember things well. Things to remember We can also put the if –clause and the unless –clause after the mai