题目内容
12.A:His grandfather doesn't know how he should use a computer.B:His grandfather doesn't know howto use a computer.
分析 他的爷爷不知道应该怎么使用电脑.
解答 答案:to use
根据从句"how he should use a computer."为宾语从句可知,这里考查"疑问词+动词不定式"的用法,在这句话中"how to use a computer"做宾语成分,意为"怎么使用电脑".故答案为:to use
点评 "疑问词+不定式"的功能:在句中可作主语、宾语、表语等成分
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