在过去，京剧中的角色只能由男性扮演，而现在，无论是男人还是女人，都可以登台演出了。

In the past, both Dan and Sheng roles were played by male actors, but now they also can be played by female.

youdao

多亏了国家健康研究所和学院科学家们在过去三十年中的研究，现在我们拥有可以治疗抑郁症、上瘾症以及一些其他精神失常症状的方法。

Thanks to research by the National Institutes of Health and academic scientists during the last three decades, we now have proven treatments for depression, addiction and other mental disorders.

youdao

现在，你可以认为这个观点不重要。同时，正如我们在过去很长一段时间挥霍能源一样，我们也在挥霍食物。

Now, you can take the view that this doesn't matter, and that's what we've done in the past, just as we've been energy profligate we've been food profligate.

youdao

And you'll use "If I were" to talk about yourself in the present in relationship to the past.

你可以用“If I were”来比较现在的你和过去的你。

If I were 课堂 - SpeakingMax英语口语达人