1. be proud of sth/sb.以......为骄傲，以...为荣; 以...自豪

proud adj.

as proud as a peacock 像孔雀那样骄傲;

pride n/v.

be proud of = take pride in以......为骄傲，以...为荣; 以...自豪

pride oneself on/upon 以......自豪， 夸耀......

她感到自豪。

She is proud of herself.

She takes pride in herself.

她妈妈以她为荣。

Her mother is proud of her daughter.

Her mother takes pride in her daughter.

他以会说法语而自豪。

He prides himself on his ability to speak French.

Sentences

1. It's my duty to do something for students in poor areas.

It is +n. to do sth.(it 形式主语to do sth.真正的主语)

It is +adj. to do sth.

帮助他人是件好事。It is good to help others.

照料那位病人是我的职责。It is my duty to care for that patient.

掌握一门外语不是件容易的事。 It is not an easy thing to master a foreign language.

在别人背后说坏话是不对的。It isn't right to speak ill of someone behind his back.

上网是件令人兴奋的事。It is exciting to surf the Internet.

2. That's why I made the decision to go.这就是我决定去的原因。

That's the reason why I made the decision to go. the reason why

此句型意为"...的理由"。why 是关系副词，由"介系词＋关系代名词which"变化而成，引导形容词子句，修饰名词。可保留why，而将前面的名词省略；也可将why省略。the reason why无非限定用法，即why之前不可以加逗点。

That's (the reason) why he cried.那就是他为何哭的原因。

That's (the reason) why I am here.那就是我在这里的原因。

That's (the reason) why you go away.那就是你离开的原因。

3. They are said to be very good students.据说他们是非常优秀的学生。

= It is said that they are very good students.

Sb. be said to be.... → It is/was said that sb. be...→People say that......

Sb. be reported to be.... → It is/was reported that sb. be... People report that...

Sb. be believed to be.... → It is/was believed that sb. be...People believe that...

He was said to be very formal, rigid and hopelessly out of date.

=It was said that he was very formal, rigid and hopelessly out of date.

据说有100多个人在这次事故中受伤.

It was said that more than 100 people were injured in this accident.

More than 100 people were said to be injured in this accident.

People say that more than 100 people were injured in this accident.