Нужна . откройте скобки пользуясь условными предложениями. 1) if i (to know) about it at that time i (to tell) you the truth. 2) if it (to be) summer now we (to go) to the seaside. 3) if he ever (polish) his shoes he (look) smart. 4) if he (give up) smoking he (look) better. буду рада любой , прост не понимаю немного)

If I known about it at the time I would have told you the truth.
If it was summer now we would have gone to the seaside.
If he ever polished his shoes he would has looked smart
If he gave up smoking he wold has looked better.

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