1) You can carry this one.

你可以拿这一个。
2) But you can have this one.

你可以要这一个。
3) Shall I take one? Yes,by all means.

我可以拿一个吗?
4) You may have them all.

你可以全拿去。
5) You may take as you like.

你可以任意拿。
6) May I take this ?

我要这个可以吗?
参考词条