4. 原因状语从句 Because As Since（既然） Now that （既然）
+ 句子，Sb. do sth.
Sb. do sth.
because as since（既然） now that （既然）
是时间状语从句？ Since sb. d
o sth. 原因状语从句？
Sb. have done sth. since sb. did sth. Since sb. did sth. , sb. have done sth. 时间状从 “ 自从。。。以来” Since sb. do sth, sb. do sth. Sb. do sth. since sb. do sth.
原因状语从句 “ 既然 ”
He has taught here since he came to Foshan. Since she was born , she has lived in this house. Since no one is against, we’ll pass it. We will pass it since no one is against. Since everyone is here, we will start the meeting.
He was disappointed because he failed again.
Because it is raining hard, let’s stay at home.
Since no one is against, we’ll pass it. Now that I’m well again, I can go on with my wo 原因从句要注意的问题： 主句与从句的时态要一致。 但：
will ( be going to ) do sth. 引导词 Sb. do/does… can/ may/ must do sth.
Do ( Don’t do ) sth.
条件状语从句：引导词（ 从属连词 ） + 句子 If 真实条件状语从句 Unless(=if…not) + 句子 As long as If it doesn’t rain tomorrow, we’ll go there. We will go there if it doesn’t rain. If you use your head, you will find a way. You will find a way if you use your head. You can have a rest if you finish your work. If you finish your work, you can have a rest.
As long as we don’t lose heart, we’ll find a way to overcome the difficulty. We will find a way to overcome the difficulty as long as we don’t lose heart. I won’t attend the meeting unless I am invited. = if I am not invited.
条件状语从句要注意的问题： 主句与从句的时态要一致。 但：
will ( be going to ) do sth. Sb. can/ may/ must do sth. 引导词 Sb. do/does… Do ( Don’t do ) sth.
时间， 条件，原因 ，让步状语从句考点
——— Sb. do sth. , sb. do sth.
Sb. do sth. ______ sb. do sth. 考虑引导词（根据上下文意思考虑时间， 条件， 原因 ，让步状语从句的引导词） When ————She came in, I was reading a novel.
if You will find a way ______ you use your head.
Because _____ it was raining hard, we stayed at home. though He went on working _____ he was tired.
Though _____ he got up early , he couldn’t catch the first bus.
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