As well (as)

As well is an adverb which means ‘also’, ‘too’ or ‘in addition’. We usually use as well at the end of a clause:

We look forward very much to seeing you again and to meeting your wife as well.

As well as is a multi-word preposition which means ‘in addition to’:

She has invited Jill as well as Kate.

When they go to Austria, they like walking as well as skiing.

We use might as well and may as well informally to mean that something is worth doing only because other things are not happening. Might as well is more common:

I might as well paint the bedroom myself; no one else is going to do it.

We may as well go out tonight because there’s not much on TV.

We use as well and the phrase just as well when we say that something is probably a good thing:

It’s as well to have a good camera with you when you visit the bird park. (as well here means ‘it’s a good idea’)

It’s just as well we didn’t go to the lecture, because it was cancelled.