(Simple present)
Keeps
Is Kept
(present continuous)
Am/Is/are keeping
Am/Is/Are being kept
(Simple past)
Kept
Was / were kept
(Past continuous)
Was/were keeping
Was/were being kept
(Present perfect)
Have kept
Have been kept
(Past perfect)
Had kept
Had been kept
(future)
Will keep
Will be kept
(Conditional present)
Would keep
Would be kept
(going to)
Going to keep
Going to be kept