Put the following sentences into the correct tense: Simple Past, Simple Present, Present Continuous or Past Continuous, Present Perfect.
1. Fred plays tennis...
2. Fred is playing tennis...
3. Fred has played tennis...
4. Fred played tennis...
5. Fred was playing tennis...
6. Fred will play tennis...
a) every Monday.
b) for several times.
c) at the moment.
d) at that time.
e) next Monday.
f) when he was 15.