如果你在翻譯成英語怎麼說

1. 如果你還在就好了``翻譯成英文

It'll be so much better if you are still with me.
「就好了」不大好直譯，所以翻譯的是：如果你還在我身邊就好多了。

2. 你是不是在翻譯。這句話英語怎麼說

好像表達方式很多：
Are you translating it or not?
Are you carrying out the translation?
Are you working on translating?
Are you busy with the translation?

3. 如果你在就好了用英語怎麼翻譯

翻譯如下
如果有你在身邊就好了
If you were around, it would be nice