Heave a sigh的用法和样例：
- I bury my face in my hands and heave a sigh.
- He heave a sigh of relief when he find his wallet.
- She heaved a sigh and became lost in thought.
- We all heaved a sigh of relief when we heard that they were safe.
- He said he agreed, heaving a sigh.
- After some calculations, however, he could only heave a sigh.