前者只用于否定句,后者用于肯定句和否定句
且用as well as的時(shí)候,后面的謂語(yǔ)動(dòng)詞用單數(shù)
如Tom as well as his parents is watching TV.
作為習(xí)語(yǔ)用作介詞時(shí),as well as的涵義是“還有”、“不但…而且…”.值得注意的是,在A as well as B的結(jié)構(gòu)里,語(yǔ)意的重點(diǎn)在 A,不在 B.因此,“He can speak Spanish as well as English．”的譯文應(yīng)該是：“他不但會(huì)說(shuō)英語(yǔ),而且會(huì)講西班牙語(yǔ)”,決不能譯作：“他不但會(huì)說(shuō)西班牙語(yǔ),而且會(huì)講英語(yǔ)”.如果這樣翻譯,就是本末倒置了.as well as和 not only… but also…同義,但前者的語(yǔ)意重點(diǎn)和后者的語(yǔ)意重點(diǎn)恰好顛倒.
如果 as well as用作連詞引出比較從句,其義為“和…一樣好”.因此,“He speaks Spanish as well as English．”應(yīng)譯作：“他說(shuō)西班牙語(yǔ)像說(shuō)英語(yǔ)一樣好”.語(yǔ)意的重點(diǎn)依舊在前部,不在后半部.
請(qǐng)注意 as well as以下的用法：
She called on you as well as I．
不但我來(lái)看你,她也拜訪了你.
She called on you as well as me．
她不但拜訪了我,也拜訪了你.
在下列句中,as well as表示“像…一樣”的涵義：
She as well as you is an English teacher．
她像你一樣也是英文教師.
這里的謂語(yǔ)動(dòng)詞用is,不用are,因?yàn)榫渲械闹髡Z(yǔ)是she,不是she和you.
As well是副詞短語(yǔ),其義為“也”,相當(dāng)于too,它一般放在句末,有時(shí)和連詞and或but搭配使用.例：
He is a worker,and a poet as well．
他是工人,但也是詩(shī)人.
China possesses enormous quantities of coal and is rich in other minerals as well．
中國(guó)擁有大量煤炭,其他的礦藏也很豐富.
Mr．Liu can speak English,but he can speak Cantonese as well．
劉先生會(huì)說(shuō)英語(yǔ),但他也能講廣東話.