下面这几句英语哪句是正确的?
what would you do if the rest of people is you?
what would you do if the rest of people was you?
what would you do if you are the rest of people?
what would you do if you were the rest of people?
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what shall i do if i don't know anyone?
what should he do if he didn't anyone?
what if i don't know anyone?
what if he doesn't know anyone?
还有就是问一下anyone everyone everybody这种词后面是三单吗?
第五句为什么用shall?为什么用don't？第六句是正确的吗？