外研社高中英语必修四module3 Grammar.pptVIP

* Body Language and Non-verbal Communication Grammar1 Adverbial clause of condition 条件状语从句 条件状语从句常用引导词有 if，unless（除非，如果不，除非在…的时候）, in case（如果，以防）, on condition that（在…条件下, 如果 ）, as long as(只要)，provided (that)/ providing (that)(假如, 在…条件下),suppose (that)/supposing (that)（如果,假如），when( 倘若)等连词引导。 注意：条件状语从句中用一般现在时代替一般将来。 3.She will go provided her friends can go also. 4.He will do the work providing you pay him. 5.As long as you’re happy, it doesn’t matter what you do. 6.In case I forget, please remind me about it. 7.Supposing it rains, shall we continue the sportsmeeting? 8.I can tell you the truth on condition that you promise to keep a secret. 1.If it rains tomorrow, I will not go swimming. 2.You will fail unless you work hard. 9.Call me when you have finished. If 引导的虚拟条件句 与现在事实相反，从句中用一般过去时(be用were)，主句用would do If I were you, I would help him. If he had enough money, he would buy that book. 与过去事实相反，从句中用过去完成时时，主句用would have done. I would have arrived much earlier if I had not been caught in the traffic. 如果没有堵车, 我会到的早一点儿。 与将来事实相反，从句中用①一般过去时(be用were) ②should do③were to do，主句用would do If it were to rain tomorrow, the meeting would be put off. If you dropped the glass, it would break. If he should see me, he would know me. 从句中有had, were, should，可将其提到主语前，并去掉if。 If I were you, I would help him. =Were I you, I would help him. If he had enough money, he would buy that book. =Had he enough money, he would buy that book. If he should see me, he would know me. = Should he see me, he would know me. But for the rain, we should have had a pleasant journey. 要不是下雨, 我们的旅行肯定会很愉快。 Without your help, we could not have finished in time. 要不是你帮忙, 我们肯定不能及时完成任务。 but for, without等引出一个介词结构也可表示条件, 条件常常是虚拟的,或与事实相反的假设。如: Grammar2 Adverbial clause of concession 让步状语从句 引导让步状语从句的主要连词有： although, though, even though/if, while，as，no mater+特殊疑问词，特殊疑问词+ever等. though, although表示“虽然, 纵然