may

Take an umbrella because it may rain later this afternoon.

(Chinese) 带把伞，因为今天下午晚些时候可能会下雨。

He may be lying about his age to join the army.

(Chinese) 他为了参军可能在年龄上撒了谎。

May I borrow your calculator for the math test?

(Chinese) 我可以在数学测验中借用你的计算器吗？

You may not leave the classroom until the bell rings.

(Chinese) 铃响之前你不准离开教室。