Use the verb in the principle clause in the past tense and make all the necessary changes: a-1.we know that we are going to begin our work tomorrow.2.i think it is beginning to rain.3.she says she is washing up and her sister is watching television.4.they say it is snowing heavily and a strong wind is blowing.5.he says they are going to britain for summerholidays.b-1.i think they have returned from the trip.2.they say they have made and lot of pictures of new york.3.we know you have travelled all over america.4.she says she has made some interesting new friends.5.he is sorry he has not been able to pass the exam.6.i am sure they have received our letter.7.she does not remember how long they have been leaning english.8.she says it has been raining ever since morning.

1. We knew the we were going to beging our work tomorrow.
2. I thought it was beginning to rain
3. she said she was washing up and her sister was watching television
4. they said it was snowing heavily and a strong wind was blowing
5. he said they were going to Britain for summerholidays
B-
1.I thought they had returned from the trip.
2. they said they had made and lot of pictures of New York.
3. we knew you had travelled all over America.
4. she said she had made some interesting new friends
5. he was sorry he had not been able to pass the exam
6. i was sure they had received our letter
7. she did not remember how long they had been leaning English
8. she said it had been raining ever since morning.