Вставьте нужную форму глагола tobe, обращая внимание на время предложения.. образуйте 2-мя отрицательную форму предложений.
a) lot of my colleagues when i came to my office. i realized iwas late.
b)there first article in this magazine.
a signature on your letter? it has not been delivered in time.
d)there a thunderstorm, i think. everything is wet through.
great deal of natural resources in russia.
f)there ..a lot ofsugar in my tea yesterday.
особенно интересует, как 2-мя можно отрицательную форму образовать.

Washington was founded in 1790 and named after the first US president, George Washington, as the capital of the sovereign states, which is called the United states of America. Washington is the residence of the President and the Congress of the USA. All government departments and numerous federal institutions are housed in the capital. the White house is the President's residence and it is the oldest building of the city. The Capitol, the seat of the Congress is the other main center of the city. The two centers are connected by Pennsylvania Avenue, the main business street of the city. The majority of the state Departments are situated here. Washington, that belongs to the specially created Federal District of Columbia, is always used as the scene for mass demonstrations, and rallies.
Вашингтон был основан в 1790 году и назван в честь первого президента США Джорджа Вашингтона, как столица суверенных штатов, которые называется Соединенными Штатами Америки. В Вашингтоне находится резиденция президента и Конгресс США. Все правительственные ведомства и многочисленные федеральные учреждения располагаются в столице. В Белом Доме находится резиденция президента, и он является самым старым зданием города. Капитолий, резиденция Конгресса является другим главным центром города. Два центра соединены Пенсильвания-авеню, главной торговой улицей города.  Там расположено большинство государственных департаментов. Вашингтон, который принадлежит к специально созданному федеральному округу Колумбия, всегда используется в качестве места для массовых демонстраций и митингов.

1) I (had not yet  done) half the work when he came in.
2) She told me everything about him after he (had left).
3) I was sorry that i ( had hurt) him.
4) We ( would have undestood ) if after the teacher (had explained) it to us.
5) He had already ( learnt) French before he left for Frence. In France he soon (  remembered) all he (had learnt).
6) I asked him what countries he (had visited).
7) She said that she (had passed) her examination successfully.
8) We (  heard) that the plane (had crushed) just over the airport.
9) The new bus-driver (  had) an accident after he ( had driven) a few yards.
10) After she (had locked) and ( bolted) all the doors she (went) to bed.
11) The students ( did) the exercises very well after the teacher (had shown) how to.
12) When the plane (had landed), the sun ( set).
13) The taecher ( gave) back the exercise-books after he (had corrected) them.
14) When i was 20 , i (went) to Moscow to stude English. At that time i thought i ( knew) English quite well because i (had studied) it for nearly ten years.
15) Mr. Brown said he (had been) in London before.