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1、原因状语从句,原因状语,Afraid of being late,they came by taxi.因为怕迟到，所以他们坐出租车来的。Thank you for reminding me.谢谢你提醒我。,Ill have to have my watch replaced because there is something wrong with the alarm.,引导词,Because，since，as等语气强弱because since asbecause不知道原因since原因明显，已知as双方都知道,They bumped her off _ she knew too much.
2、因为她知道太多，所以他们把她干掉了。_ you are free today,you had better help me with my mathematics.既然今天你休息，你最好帮我补习数学。_it is raining,youd better take a taxi.因为在下雨，你最好乘出租汽车。,because,Since,As,（1）回答why，只能用because。A：Why cant I go?B：_ you are too young.,Because,（2)不能将because,since,as等与so连用。,2._ he is ill,_he cannot come.A
3、.Because,/B.Because,so C.Though,but D.Though,/,A,because和because of,because+从句because of+名词短语他因病不能来。He cant come because he is ill.He cant come because of his illness.,Read and combine.,I bought the house simply.It is large.I bought the house simply because it is large.,Language in use,1.Everybody s
4、tays under the tree.It is very hot.,As it is very hot,everybody stays under the tree.,Language in use,2.The boy couldnt draw money from the ATM.He forgot the pin.,The boy couldnt draw money from the ATM because he forgot the pin.,Language in use,3.I will explain again.You do not understand.,Since you do not understand,I will explain again.,目的状语从句,引导词,so that，in order that等“以便”,I lent him$50 in order that he might go for a holiday.我借给他50美元，以便他能去度假。他早起以便他能够赶上首班车。He got up early so that he could catch the first bus.谓语前常含有may,might,can,could,should,would等情态动词。,
