高二英语语法:状语从句讲解
[导读] 语与主句主语一致(或虽不一致,是it),从句的谓语又包含动词be,就可省略从句中的“主语 + be”部分。 e.g. When (he was) still a boy of ten, he had to work day and night. If (you are) asked you may come in. If (it is) necessary I'll explain to you again. 3. 注意区分不同从句:引导的是什么从句,不仅要根据连词,还要根据句子结构和句意来判别。以where为例,能引导多种从句。 e.g. You are to find it where you left it.(地点状语从句) Tell me the address where he lives.(定语从句,句中有先行词) I don't know where he came from.(宾语从句) Where he has gone is not known yet.(主语从句) This place is where they once hid.(表语从句)上一页 [1] [2]
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十、使用状语从句时要注意的几个问题
1. 在时间和条件(有时也在方式、让步等)从句中,主句是一般将来时,从句通常用一般现在时表示将来。
e.g. We'll go outing if it doesn't rain tomorrow.
I'll write to you as soon as I get to Shanghai.
2. 有些时间、地点、条件、方式或让步从句,如果从句的主语与主句主语一致(或虽不一致,是it),从句的谓语又包含动词be,就可省略从句中的“主语 + be”部分。
e.g. When (he was) still a boy of ten, he had to work day and night.
If (you are) asked you may come in.
If (it is) necessary I'll explain to you again.
3. 注意区分不同从句:引导的是什么从句,不仅要根据连词,还要根据句子结构和句意来判别。以where为例,能引导多种从句。
e.g. You are to find it where you left it.(地点状语从句)
Tell me the address where he lives.(定语从句,句中有先行词)
I don't know where he came from.(宾语从句)
Where he has gone is not known yet.(主语从句)
This place is where they once hid.(表语从句)
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