also和too的替代要怎麼替代，怎麼替代。

also和too都是「也是」的意思

also放於句中
be動詞之後，一般動詞之前

too放於句尾，前面要加「逗號」
但注意，如果是「否定句」
too要改成「either」

also和too都是副詞,都是"也"的意思
但是also是放在句中,而too則是放在句尾
also是放在句中的"Be動詞之後或一般動詞之前"


He is also a student.
=He is a student,too.
(他也是個學生)

They also work every day.
=They work every day,too.
(他們也每天工作)

"too" and "also" means the same, however, their placing in the sentence is different. Generally speaking, "also" is placed within the sentence, but "too" is placed at the end of the sentence, for example:

I can also speak French.
I speak French too.

I am also studying economics.
I am studying economics too.

I have also been to Hong Kong.
I have been to Hong Kong too.


Although "too" is usually placed at the end of a clause, it can sometimes be used with commas after the subject of the sentence. This is usually only done in formal speech:

Mr. Jones wanted the contract. Ms. Jackson, too, thought it was necessary.

By the way, "too" and "also" use with positive sentences. For negative sentence, you use "either".


2013-04-20 13:26:22 補充：
for comparison, I shall write "I speak French too" as

I can speak French too.