你如果现在不买，你会错失良机的。

If you don't buy now, you may find that you've missed the boat.

《牛津词典》

你如果现在走就可以避开人群。

If you go now you should miss the crowds.

《牛津词典》

你如果现在不做，以后一定会后悔的。

If you don't do it now, you'll only regret it.

《牛津词典》

Now if they had taken another set of 446 anorexics, and again June was the month, then there would be some credibility in it.

现在如果他们选择另一组446位女性，然后同样做出六月的结论，这样可能就更可信了。

麻省理工公开课 - 计算机科学及编程导论课程节选

You know, if you are looking to go into business, learn math really well, learn economics really well.

例如，如果你将来想从商，你现在就要学好数学和经济学。

如果是在考虑留学 - SpeakingMax英语口语达人

If you don't know why you're about to eat cake like that you will soon, but you know this.

如果你现在还不知道为什么将要吃到那样的蛋糕,很快就会知道的，你清楚这一点。

哈佛公开课 - 计算机科学课程节选