Title says it all. I am looking for sentence structures that can convey this meaning.
To say "you can/may ____" or "it's okay to ____", use this structure:
[verb, te-form] + も (optional) + いい
This can also be used with negatives to say "it's okay not to ____"
Positive Example: 「入っていいですよ」 (inviting someone to come into your house/room)
Positive Example (casual): 「入っていいよ」
Negative Example: 「心配しなくていいですよ」 "It's okay"/"Don't worry (about it)"; literally "it's okay not to worry"
Negative Example (casual): 「心配しなくていいよ」
- も, like a lot of other particles, is usually ommitted when spoken or in chat and included in formal, written communication like e-mail, letters, papers, books, etc.
- The sentence ending ~よ is often tagged on the end of sentences that use this structure.
It differs depending on the connotation you want to attach to 'able to'
Ability : できる or the 可能形 (ability form of verbs)
For example, 自分で料理できますか？means are you able to do the cooking yourself? ピアノが弾けます (possibility form of 弾く) means I am able to play the piano.
Permission : でもいい？ or 〜っていいよ
ちょっとトイレに行ってもいい？ Means can I go to the toilet for a bit? This indicates not the ability to go to the toilet but rather the permission to go to the toilet.
Possibility : 可能
Literally the word means possibility, and this refers more to things which are physically possible, or possible within a set of rules. Also is a more formal form of no.1.
For example, 一年で日本語を学ぶことは可能ですか？ means is it possible to learn Japanese in a year.