1improbable
2unlikely
3will not (act, happen etc)
4not able
5not having learned to do sth
6(coll.) (Tw) don't mention it
7not at all
Examples
wǒ我zài在xiǎng想nǐ你jīn tiān今天huì会bú huì不会lái来。
我在想你今天会不会来。
I was wondering if you were going to show up today.
我想知道天会不会变晴。
I wonder if it will be sunny outside.
我禁不住想他会不会准时到。
I cannot help wondering if he will come on time.