情態動詞:比較may和might

1) 表示允許或請求;表示沒有把握的推測;may 放在句首,表示祝願。
may god bless you!
he might be at home.
注意: might 表示推測時,不表示時態。只是可能性比may 小。

2) 成語: may/might as well,後面接不帶to 的不定式,意為"不妨"。
  if that is the case, we may as well try.

典型例題
 peter ___come with us tonight, but he isn't very sure yet.
  a. mustb. may  c. can  d. will
 答案b. 表可能性只能用may. 此句意可從後半句推出。