不定式作独立成分·综合用法
■so to speak可以说，可谓
The dog is, so to speak, a member of the family. 那狗可以说是家庭的一员了。
He is, so to speak, the brains of the organization. 他可说是这个机构的大脑。
■to be exact 精确地说
He’s in his mid-fifties; well, fifty-six to be exact. 他五十多岁；嗯，确切地说是五十六岁。
It happened late last century in 1995, to be exact. 事情发生在上个世纪末——准确地说，在1995年。
■to be sure 无可否认，诚然
He’s a nice person, to be sure. 肯定他是一个好人。
He is clever, to be sure, but not very hard-working. 他聪明是聪明，但是不怎么勤奋。
■to make matters [things] worse 更糟的是
To make matters worse, he refused to apologize. 更糟的是，他拒不道歉。
To make matters [things] worse, it started to snow when evening came. 更糟糕的是，夜幕降临时，天开始下起雪来了。