Present Simple - swims
Present Cont. - is swimming
Past Simple - swam
Past Cont. - тут нет, но на всякий случай was/were swimming
Future Simple - will swim
Present Perfect - has swum
Present Perfect Cont. - has been swimming
Past Perfect - had swum
Present Simple - swims
Present Cont. - is swimming
Past Simple - swam
Past Cont. - тут нет, но на всякий случай was/were swimming
Future Simple - will swim
Present Perfect - has swum
Present Perfect Cont. - has been swimming
Past Perfect - had swum