一、Also
also是用在肯定句里面,它表示的是两个人干了同样的事,或者两件事是同一个人干的,also一般是位于be动词,助动词,情态动词的后面,但在行动词的前面。比如像:
He has been to Beijing. I have also been there.
He is good at English. He is also good at Japanese.
不过不也有一种特殊情况,那就是在表示强调的时候,also也是可以放在be动词,助动词,情态动词的前面。比如像:
I can also do it.
I also can do it.
二、As well
这个一般在口语中用的比较多,也是用于肯定句,和too可以进行互换,通常是位于句末。比如像:
She not only sings,
She plays the piano as well.
三、Too
Too和as well的用法基本一样,它比also会更加的通俗易懂,和also,as well都可以进行相互的替换,可以放在句子的中间,也可以放在句末位置。比如像:
Xiao Li went to Beijing and Xiao Zhao, too, went to Beijing.
He studies hard and I study hard, too.
四、Either
这个与前面三个不太一样,它是用在否定句里面的,并且还只能放在句末。比如像:
He didn't know it. I didn't know it either.
I can't speak French and can't write it, either.