What is the grammatical difference between too and as well ?

tootoo, also, as well: are used in affirmative sentences, indicating how the former is and what the latter is.

too: Generally placed at the end of the sentence, it can be separated by a comma and the previous sentence, or it can not be used;

also: It is mostly placed after the verb be, the auxiliary verb, and the modal verb, and before the verb in the real sense;

as well: its position is generally placed at the end of the sentence, and the three can be converted into synonymous sentences. For example:

you need to go shopping and i need to go shopping, too.

you need to go shopping and i also need to go shopping.

you need to go shopping and i need to go shopping as well.

1.Too and as well are mostly used in spoken language, with a lighter tone, usually used in affirmative or interrogative sentences, generally not used in negative sentences, and are usually placed at the end of sentences. Such as:

i like you too [as well].I like you too. are they coming too [as well]?

Are they coming too? Too is also sometimes used immediately after the subject (note: as well is not used this way), and this usage is more formal.

Such as: i, too, know where he livesI also know where he lives.

In abbreviated responses such as me too, you too are usually not used as well, also. Such as: a:

i’m tired.I am tired. b：

me too.Me too.

too can only be used at the end of a sentence; As well is used in the middle of a sentence or at the end of a sentence, and it is easier and more widely used.

As well and too are used in affirmative sentences, meaning "also", indicating how the former is and what the latter is. As well is mostly used in colloquial language, usually at the end of a sentence. Too is used in exactly the same way as as well, but in a more flexible position, which can be placed in the middle of a sentence or at the end of a sentence.

Too uses a comma, and as well does not use a comma.

Hope everyone