VOA慢速英语:Screening for Breast, Cervical Cancer: The New Advice

Yet用法

■yet用作连词时，与but一样也主要用于转折，意为“但是”“而”：

I have failed, yet I shall try again. 我失败了，但我还要尝试。

The judge was stern, yet completely fair. 法官很严峻，却完全公正。

They are the same, yet not the same. 它们又一样，又不一样。

It is strange, yet it is true. 那真是怪事，然而却是事实。

I’ve been away only for three years, yet I can hardly recognize my hometown. 我仅在外三年，可我几乎认不出我自己的故乡了。

He said he was our friend, yet he wouldn’t help us. 他说他是我们的朋友，但却不肯帮助我们。

■有时用在句首。如：

Yet the house was cheerful. 但屋子里显得很欢快。

Yet its population has doubled. 但它的人口翻了一番。

■yet有时可与并列连词and或but连用，构成习语and yet和but yet，且两者大致同义(均相当于表转折的but)：

I gave him ten pounds (and) yet he was not satisfied. 我给了他十镑但他仍不满足。

She’s vain and foolish, and yet people like her. 她很虚荣愚蠢，但人们却喜欢她。

She drove very fast to the airport, but [yet, and yet, but yet] she missed the plane. 她开快车去机场，可还是误了飞机。

■although不能与表示转折的but连用，但是却可以与yet连用。如：

Although we have made some progress, yet we still have a long way to go. 我们虽然取得了些进步，但还是远远不够的。（注：转自英语语法网）

2.The experts advised most women to get fewer mammograms.

advise用法

1)用作及物动词时，注意后接动名词 (不能直接跟不定式)或不定式的复合结构：

正：He advised leaving early. 他建议早点出发。

正：He advised us to leave early. 他建议我们早点出发。

误：He advised to leave early.

注意 advise 后接不定式复合结构时的被动语态形式 (不要与上面第一个句型混为一谈)：

He advised us to leave early. (主动式)

→We were advised to leave early. (被动式) 

2)其后若接 that 从句，通常要用虚拟语气 (should＋v. )：

He advised that we (should) leave early. 他建议我们早点出发。

We advised that he should leave early. 我们建议他早点出发。

He advised that everyone should buy one. 他建议每人买一个。

3.The American College of Obstetricians and Gynecologists said the timing was just by chance.

by chance偶然地, 意外地

例句：I met her quite by chance.
      我遇见她完全是偶然的。

      I heard their talking by chance.
      我偶然听到他们的谈话。

4.Girls are advised to begin testing within three years of when they first have sex, or in any case no later than twenty-one.

in any case无论如何, 不管怎样

例句：It may rain tomorrow, but we are going home in any case.
       明天可能下雨, 但不管怎样, 我们打算回家去。