如果李教授明天有空的话，我们可以问他点问题。
If Professor Li should have time tomorrow, we could ask him some questions.
如果李教授明天有时间的话，我们可以问他一些问题。
If Professor Li should have time tomorrow, we could ask him some questions.
他仍然住在我们的房子里，是的，但我并不觉得我可以问他要钱。
He's living in our house, yes, but I don't feel I can ask him for money.
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