When can I get my test results?
我什么时候可以拿到化验结果？
We can reduce the problem to two main issues.
我们可以将这个问题概括成两个要点。
How long can a human being go without sleep?
人不睡觉能活多久？
The operation could prolong his life by two or three years.
这次手术可使他多活两三年。
I could come next week, or the week after.
我可能下周来，或者再下一周。
You could see from his face that he was lying.
从他的表情上你可以看出他在说假话。