Imagine two people are studying for a test.

假设有两个人正在为考试学习。

I have been studying it for a long time.

我已经学习很久了。

I am studying for my exams on building materials.

我正在准备建材考试。

Researchers have been studying the microbes for nine years.

科学家研究这种微生物已长达9年。

Scientists have been studying these whales for many years.

科学家研究这些鲸鱼多年。

She has been studying the dodo for 20 years.

她研究渡渡鸟已有 20 年了。

He has been studying the bear at the North Pole for years.

他在北极研究北极熊已有多年。

I'm studying for an International Baccalaureate.

我进行国际中学毕业会考。

Hayashi has been studying spider silk for about 20 years.

林研究蜘蛛丝已有20年的时间。

He has been studying penguins for more than 50 years.

他研究企鹅已经超过50年了。

We've been studying microbes and cells for a long time.

我们研究微生物和细胞已经很长一段时间了。

Jill Johnstone has been studying boreal forest ecology for decades.

吉尔·约翰斯通几十年来一直在研究北方森林生态学。

Do plenty of physical exercise while you are studying for exams.

准备考试的时候多做体育锻炼。

Volkov has been studying public opinion in Russia for over 10 years.

沃尔科夫研究俄罗斯公众舆论已有十多年。

Pete's always telling jokes when we should be studying for our exams.

Pet总是在我们该为考试而学习的时候讲笑话。

Hogan has been studying biodiversity in the Mekong for more than 20 years.

霍根研究湄公河生物多样性已有20多年。

It was a warm night, and he had been studying hard for some hours.

那天晚上很燠热，他认真地学了好几个小时。

I'd like to haw further education.Now I am studying for my doctorats.

我想去美国深造，现在我正在攻读博士学位。

Letter 1 Helpful I have been studying at a tutorial centre for two years.

信件1 有帮助的我已经在指导中心学习了两年了。

You may have tried this technique the last time you were studying for a test.

你也许在考试前用过这招。