Exercise. Complete each sentence with the correct form of the given VERBS.
1. They ........................ to play chess since they were 4 years old
. A. will learn B. learned C. have learned D. were learning
2. The students ...................... this project for 3 months.
A. did B. have done C. are doing D. were doing
3. She ..................... John since he moved here.
A. had known B. knows C. knew D. has known
4. The boys have played football since they .................... grade 4.
A. learned B. have learned C. were learning D. will learn
5. My parents ....................... here for 20 years
. A. worked B. work C. have worked D. are working
6. When she ........................... the meal, her mother called
. A. is cooking B. cooked C. has cooked D. was cooking
7. They saw me when I ....................... along the street.
A. walks B. was walking C. walked D. is walking
8. We .....................volunteer work while she was playing sports.
A. did B. were doing C. do D. had done
9. While my sister ...................... homework, my brothers were playing games.
A. did B. has done C. is doing D. was doing
10. After my mother .................... T.V, she went to bed.
A. is watching B. watched C. had watched D. was watching
11. By the time we play football, we ........................ all my homework.
A. had finished B. finished C. were finishing D. will finish
12. By the time she goes out with friends, she .................... all housework
. A. finishes B. will have finished C. is finishing D. finished
13. They will be here before the bus ..................... .
A. was coming B. had come C. comes D. came