He swims every day.(Present Simple)
Present Continuous. He is swimming now.
Present Perfect. He has already swum.
Present Perfect Continuous. He has been swimming since 8 a.m.
Past Continuous. He was swimming from 7 till 8.
Past Perfect. He had swum yesterday by 6 p.m.
Past Simple. He swam two days ago.
Past Perfect Continuous. He had been swimming all evening.
Future Continuous. He will be swimming all day tomorrow.
Future Simple. He will swim tomorrow.
Future Perfect. He will have swum tomorrow by 3 o'clock.
he is swimming at the moment
he swim every day
he has been swimming since the morning
he was swimming at 7 o'clock
he has swum already
he swam yesterday
he had been swimming for an hour
he will be swimming at 6 o'clock
he will swim tomorrow
he will have swum