主要是宾语从句和状语从句,如果说考的稍微难一些的话就是定语从句以及名词性从句,一般考的话后两者的难度不会很大.
宾语从句在句中作及物动词或介词的宾语,从句放在主句之后,前后不用逗号分开.
宾语从句：
引导宾语从句的词有：
连词that(在口语中that常可省略),if,whether,如：
He knows that Jim will work hard.
连接代词who,whom,which等,如：
Do you know who (whom) they are waiting for?
连接副词when,where,how,why等,如：Could you tell me how we can get to the station?
3.whether和if都有“是否”的意思,一般情况下两者可以换用,但在介词之后,
不定式之前,与or not连用,在句首或在引导表语从句,同位语从句时,只能用whether,如：I want to know if/whether the news is true.He doesn't know whether to stay or not?
4.宾语从句要用陈述句语序.
5.宾语从句一定要注意时态呼应,即：当主句谓语动词是过去式时,从句中谓语动
词也要用过去范畴的时态,但若从句陈述的是真理或客观规律,其谓语的时态仍用一般现在时,如：
He asked who could answer the question.
My father told me that the earth goes around the sun.
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