not give someone the time of day(кого-либо: He won't give the time of day to someone like you or me. • I tried to say "hi", but she wouldn't give me the time of day.)
by no stretch of the imagination(если в другом месте в предложении уже есть отрицание, "by no" трансформируется в "(not) by any"): The Samsung Galaxy S8 isn't the cheapest phone on the market by any stretch of the imagination; in fact, it's one of the most expensive.4uzhoj)
if it's the last thing I do(досл. "(даже) если это последняя вещь(, которую) я (с)делаю": I've been training all my life in this sport. By God, I'm going to win a gold medal if it's the last thing I do!thefreedictionary.comShabe)
if only to(можно заменить на неидиоматическое even if it were only to: Even what happened to Tim wasn't your fault, but it was nice to hear you apologize anyway. [Even ] if [it were] only to know you could do it in the future.wordreference.com)