I. Use the correct tense-forms of the verbs in brackets. 1. Arthur Conan Doyle (to be) a doctor who (to become)
famous for his detective stories.
2. Pete (to pack) his suitcase now. He (to leave) for Moscow
tonight.
3. The children (not to allow) to watch the cartoons. They
were not suitable for their
age.
4. I(to write) to my parents a fortnight ago, but I(not to get)
a reply yet.
5. I (to see) this film several times. I first (to see) it three
years ago
6. I often (to read detective stories. 1 (to read) a very
interesting one now,
7. I can't go out because I (not to finish) thought with it.​

1. I have to write a report in History every week.
Do you have to write report in history every week?
No, you don't have to write a report in history every week.
2. Mike has to go to his music class every evening.
Does Mike have to go to his music class every evening?
Mike doesn't have to go to his music class every evening.
3. Yesterday my parents had to meet me at the station at 6 o’clock.
Did your parents have to meet you at the station at six o'clock yesterday? 
No, your parents didn't have to meet you at the station at six o'clock yesterday.
4. Last month Boris had to clean his classroom every day.
Did Boris have to clean his classroom every day las month?
No, Boris didn't have to clean his classroom every day last month.
5. Next week we will have to do 3 tests in English.
Will you have to do 3 tests in English next week?
No, you will not (won't) have to do three tests in English next week.

Берем предложение China imported a record amount of Russian crude last month и преобразуем в следующие видовременные формы:

Present Simple
China imports a record amount of Russian crude monthly.

Present Continuous
China is importing a record amount of Russian crude these days.

Present Perfect
China has imported a record amount of Russian crude this month.

Present Perfect Continuous
China has been importing a record amount of Russian crude for two years.

Past Simple
China imported a record amount of Russian crude last month.

Past Continuous
While U.S. President Barack Obama was seeking to encourage Chinese criticism of Russia on Ukraine, China was importing Russian crude.

Past Perfect
When U.S. President Barack Obama sought to encourage Chinese criticism of Russia on Ukraine, China had already imported a record amount of Russian crude. 

Past Perfect Continuous
When world leaders gathered in The Hague to discuss nuclear security issues, China had been importing Russian crude for two years.