by yourself例句
- How long were you by yourself in the classroom?
你独自一人在教室里多长时间了?
- Are you sure you did this exercise by yourself?
这个练习真是你自己做的吗?
- Since you are already of age now, you should solve the problems by yourself.
你已经成年了，这些问题要自己解决。
- You can't go mountain climbing by yourself.
你不能自己去登山。
- I believe that you can work out this problem by yourself.
我相信你自己能做出这道题的。
