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as well as 有连词性质还是介词形式?怎么用?

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as well as 有连词性质还是介词形式?怎么用?
as well as 有连词性质还是介词形式?怎么用?
连词性质as well as连接两个动词时,有三种情况:1)前后两个动词的时态要一致.即:若第一个动词是一般现在时,第二个动词也应是一般现在时;若第一个动词是一般过去时,第二个动词也应是一般过去时.例如:He publishes(published)as well as prints(printed)his own books.他的书是自己印刷并出版的.2)如果第一个动词是复合时态,或由can,may,must等加动词构成时,as well as后面可省去助动词或情态动词,此时,as well as意为“既……又……”.例如:We are repairing the roof as well as painting the walls.我们在粉刷墙壁,同时也在修理屋顶.She can /could sing as well as dance.她既会跳舞也会唱歌.3)如果第一个动词是不定式,as well as后面的动词也要用不定式,但要去掉to.例如:You can't expect her to do the housework as well as look after the children.你不可能叫她既照管孩子又做家务.5.注意as well as的另外两层涵义:1)as well as还有“除……之外”之意.例如:As well as knowing some Russian,she speaks English very well.除了懂得一点俄语之外,她的英语讲得很好.2)as well as还可视为as...as结构,用于副词的同等比较.可解作“和……一样好”.例如:He can speak English as well as you can. 他的英语说得和你一样好.参考资料:http://school.ecp.com.cn/school29/zxjs_0307/ca6967.htm