If not you ,I don't know What's to be done.语法有错么我的意思是如果没有你

If not you ,I don't know What's to be done.语法有错么我的意思是如果没有你
If not you ,I don't know What's to be done.语法有错么
我的意思是如果没有你

If not you ,I don't know What's to be done.语法有错么我的意思是如果没有你
If it is not you,I don' know what to do
如果那不是你,我不知道要做什么/我不知所措
当然what to be done也可以,就是复杂一些

有错。
If it is not you,.....

没有错 不过 be to do 表将来时不太正式 will to be done 正式点

If there aren't you

if i lost you ,i don't know what i suppose to do.
如果失去了你，我不知该如何是好