Open the brackets:
1)I already (to write) the letter.
2)I (to write) the letter yesterday.
3)Next week they (to see) the film.
4)She (to swim) well.
5)The teacher (to check) the students' works every evening.
6)Last week Mary (to visit) her granny.
7)We (to be) good student.
8)Now we (to write) a test.
9)Every month we (to do) a new experiment.
10)At the moment students (to listen to) the teacher.

1. I have already written the letter.2. I wrote the letter yesterday.3. Next week they will see the film.4. She swims well.5. The teacher checks the student`s works every evening.6. Last week Mary visited her granny.7. We are good students.8. Now we are writing a test.9. Every month we do a new experiment.10. At the moment students are listening to the teacher.