threaten to do sth.

• 扬言要 ...

threaten to do sth.的用法和样例：

例句

1. Threaten to do sth They threatened revenge.
   他们扬言要报复。
2. The terrorists are threatening to blow up the hijacked airliner.
   恐怖分子扬言要炸毁劫持的客机。