It is difficult, if not impossible, to persuade him.

This restaurant is as good as if not better than the one we went to last week.

Her sunny smile is not unlike a warm summer day.

I do not mind doing extra work on weekends.

I asked the group if anyone was passionate about experimental jazz, but the quick reply was 'Not a soul!', meaning not a single person liked it.

Given the unpredictable market, it is as likely as not that prices will drop soon.

He didn't participate in the meeting, not so much as ask a question.