都可以引导宾语从句;但?在介词之后只能用whether,另外,从句后有or not或动词不定式时,只能?用whether。Р3. 当宾语从句是特殊疑问句时,由疑问代词(what, who, whom, which, whose)或疑问副词(when, where, how, why)引导,因为连接代词? 或连接副词在从句中担任一定的句子成分,具? 有一定的意义,所以不可以省略.РDo you know what he said just now ?? I don’t remember when we arrived .? I asked him where I could get so much money .? Please tell me who (whom) we have to see .? Do you know what time the plane leaves ?Р二、时态?1. 如果主句是现在的时态(包括一般现在时,? 现在进行时,现在完成时),从句的时态可根? 据实际情况而定,(包括一般现在时,一般过? 去时,一般将来时,现在完成时等)РI know he lives here .?I know he lived here ten years ago . ?I have heard that he e tomorrow .Р2.如果主句是过去的时态(包括一般过去时,过去进行时),那么从句的时态一定要用相对应的过去的某种时态(包括一般过去时,过去进行时,过去将来时, 过去完成时)РI knew who lived here. ?I saw she was talking with her mother. ?He asked whether his father e back? tomorrow. ?He said that he had seen it .
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