9.引导目的状语从句的从属连词有so that和in order that(以便，为了)等。

The teacher spoke loudly so that /in order that we could hear him clearly.

10.引导结果状语从句的从属连词有：so that(结果是)和so/such…that…(如此…以至于)等。

It was very cold, so that the water in the bowl froze.

He got there so early that he got a good seat.

It is such a heavy box that nobody can move it.

11.引导比较状语从句的从属连词有： as…as…(与……一样),not as/so… as…(不及，赶不上),和than(比)等。

I know you better than she does.

He works as carefully as she.

I can’t run as/so fast as you.

12.引导名词性从句的从属连词有：that和 if/whether(是否)等。

We know that the earth goes around the sun.(宾语从句)

I wonder if he has received my e-mail. (宾语从句)

Whether he’ll go there hasn’t been decided.(主语从句)

注意：在时间状语从句和条件状语从句中，如果主句是将来时，从句要用一般现在时。

I’ll go on with the work when I come back tomorrow.

He won’t come unless he is invited.

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