These Tense sentences generally trouble the students

Q. Use correct tense:

1. I ……..(know )you for 10 years
2. That day I ………..(Watch) TV for 3 hrs
3. Before I reached, he……..( finish) his dinner
4. Before I reach…., he ( finish) his dinner
5. By the time the train arrives , We………( reach) the station.
6. By the time the train arrived, we…….( reach ) the station
7. Tomorrow at this hour, we……(travel) on the train
8. Here the guests……….( come) 
9. Look, they ………..( tease) us
10. He………( not come) yet

    Ans:
    1. have known
    2. had been watching
    3. had finished
    4. will have finished
    5. will have reached
    6. had reached
    7. will be travelling
    8. come
    9. are teasing
    10. has not come