В этих выражениях the не используется

1) we thought that he will translate the text next lesson. they were sure that you have answered the letter already.  2) she hoped that you help her some time. i thought that my friend has seen this film already.  3) i was sure that the teacher will ask me at the next lesson. she thought that didthe lab. work at that time.  4) we understood that you have done this work already. i hoped that my sister will cometo moscow next month.  5) we knew that our friend reads newspapers every day. they saw that i had written an exercise at that time.  6) we hoped that train starts in time. they were sure that you have passed all exams already.  7) we knew that he had kept his promise. i thought that my friend  played tennis at that time.  8) she was sure that she had bought flowers in the market. we didn't know that he has gone  on business trip already.  9) they understood that he was preparing for the exam at that time. he said that he will return in 10 minutes.  10) i was sure that you had done this work quickly.

1) we thought that he will translate the text next lesson. they were sure that you have answered the letter already. 2) she hoped that you help her some time. i thought that my friend has seen this film already. 3) i was sure that the teacher will ask me at the next lesson. she thought that didthe lab. work at that time. 4) we understood that you have done this work already. i hoped that my sister will cometo moscow next month. 5) we knew that our friend reads newspapers every day. they saw that i had written an exercise at that time. 6) we hoped that train starts in time. they were sure that you have passed all exams already. 7) we knew that he had kepthis promise. i thought that my friend  played tennis at that time. 8) she was sure that she had bought flowers in the market. we didn't know that he has gone  on business trip already. 9) they understood that he was preparing for the exam at that time. he said that he will return in 10 minutes. 10) i was sure that you had done this work quickly.