动词不定式可用作独立成分来修饰整个句子，常见的有：
to begin with
to tell the truth
to make a long story short
so to speak
to be brief/exact/frank/honest
to say nothing of（姑且不说）
to say the least（至少可以这么说）
以上所列短语均为口语中常用短语。请做到脱口而出！
a. To begin with, on behalf of all of your American guests, I wish to thank you for the incomparable hospitality.
首先，我谨代表所有美国客人向你们表示感谢，感谢你们无可比拟的盛情款待。（美国前总统尼克松1972年访华时的祝酒辞开篇）
b.— You’re in pretty lousy mood, huh?
— To say the least.
c.I have a point there, to say the least.
d. To make a long story short , he is in hospital now.