5. put the sentences into the future and past tense changing the verb to be and using suitable adverbial modifiers of time: yesterday, tomorrow, next week, last month, next year, at 5 o’clock, etc. 1. victor is free in the evening. 2. john is in america. 3. i am very busy. 4. she is at the lecture. 5. the child is 10 years old. 6. this work is interesting. 7. the expedition is in africa.8. the new film is long. 9. my mother is at home. 10. the workers are at the factory. 11. the students are at the institute

1) Victor will be free tomorrow evening
Victor was free yesterday evening
2) John will be in Africa next month
John was in Africa last year 
3) I will be very busy tomorrow 
I was very busy last week
4) She will be at the lecture at 5 o'clock
She was at the lecture on Tuesday
5) The child will be 10 yers old next month
The child was 10 years old yesterday
6) This work will be interesting
Nhis work was interesting next year
7) The expedition will be in Africa next month
The expidition was in Africa last Sunday
8) The film will be long
The film was ling
9) My mother will be at home at 10 o'clock
My mother was at home at 3 o'clock
10) The students will be in the institute on Friday
The students was in institute yesterday