I have to say in her defence that she knew nothing about it beforehand.

我得为她说句话，她事先并不知道此事。

《牛津词典》

A lot of the stuff in the story is not true, but I have to say that where there's smoke there's fire.

故事中有许多事情都不是真的，但我不得不说，无风不起浪。

《柯林斯英汉双解大词典》

I have to say that I like it very much.

我不得不说我非常喜欢它。

youdao

"Safety and security of our volunteers is absolutely our top priority and we are continually looking at this topic and I have to say that in the last few years we have done an amazing amount of work to try to improve both our systems to support volunteers, to ensure confidentiality and to strengthen their preparedness and training."

VOA: special.2011.03.28

Well, I have to say, I did not like chemistry in high school, so I did not think about going to college to study chemistry.

我在高中时一点都不喜欢化学,所以我去大学,更本就没考虑过学化学。

麻省理工公开课 - 化学原理课程节选

because the weather is better here. That's one good thing I have to say about it.

因为这里的天气比家乡的天气要好。这一点我得提一提。

旧金山的景点 - SpeakingMax英语口语达人

So I have to say yes, everybody fell down on the job at the same time.

NPR: With White House Bogged Down By Scandal, GOP Looks For Boost

"When I was told about it, I have to say I found it surprising, " admits Rhimes.

FORBES: In Defense Of Katherine Heigl

And I have to say that I am heartened but what I see here today.

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