Question

5．如果他們不招待我們，我們就捉弄他們一下．
If they do not give us a treat，we'll play a trick on them．．

Answer 1

分析 If they do not give us a treat，we'll play a trick on them．

解答 答案：If they do not give us a treat，we'll play a trick on them．
這里用if引導(dǎo)的條件狀語從句，遵循主將從現(xiàn)的規(guī)則，主句用一般將來時will+動詞原形，主語we，play a trick on sb捉弄某人，故we'll play a trick on them．從句用一般現(xiàn)在時，主語they，招待某人give sb s treat，借助于do構(gòu)成否定，故答案是If they do not give us a treat，we'll play a trick on them．

點評 if條件句的時態(tài)搭配
　　1．if從句用一般現(xiàn)在時，主句用一般將來時
　　If he runs he'll get there in time．如果他用跑的，他就會及時趕到那兒．
　　The cat will scratch you if you pull her tail．如果你拉貓的尾巴，它就會抓你．
　　2．if從句用一般現(xiàn)在時，主句用may/might/can
　　If the fog gets thicker the plane may/might be diverted．如果霧在大一些，飛機可能就會改在別的機場降落．
　　If it stops snowing we can go out．如果雪停了，我們就可以出去．
　　3．if從句用一般現(xiàn)在時，主句用must/should
　　If you want to lose weight you must/should eat less bread．如果你想減肥，你必須少吃面包．