Define whether the following sentences are TRUE (T) or FALSE (F).

Correct mistakes.


1. I have been in Mexico during the summer of 1970. 2. Mary had prepared dinner when I arrived, so we were able to eat immediately. 3. Three years ago he had been a student at a university in California. 4. We have collected stamps for many years. 5. We took the bus downtown, did a few errands, and had gone to lunch. 6. Since he bought a new car, he has been driving to work every day. 7. Last night they have recognized us from the party we went to earlier in the week. 8. Since Ted graduated, he has been working with his father. 9. The doctor had seen ten patients since eight o'clock this morning. 10. He is studying English for the last five years.​