keep -> содержать
Образование времен (Действует субъект! - Актив т.е. действительный залог):
  Past - ПрошлоеPresent - НастоящееFuture - Будущее
Simple - Факт
I/he/she/it/we/you/they
kept
did keep
----
did not keep
did'nt keep
I/we/you/theyhe/she/it
keepkeeps
do keepdoes keep
----
do not keepdoes not keep
do'nt keepdoes'nt keep
I/he/she/it/we/you/they
will keep
 
----
will not keep
won't keep
Continous - процесс
I/he/she/itwe/you/they
was keepingwere keeping
----
was not keepingwere not keeping
Ihe/she/itwe/you/they
am keepingis keepingare keeping
----
am not keepingis not keepingare not keeping
 is'nt keepingare'nt keeping
I/he/she/it/we/you/they
will be keep
----
will not be keep
won't keep
Perfect - Завершенность
I/he/she/it/we/you/they
had kept
----
had not kept
had'nt kept
I/we/you/theyhe/she/it
have kepthas kept
----
have not kepthas not kept
haven't kepthasn't kept
I/he/she/it/we/you/they
will be kept
----
will not be kept
won't be kept
Perfect Continous - Процесс в периоде
I/he/she/it/we/you/they
had been keeping
I/we/you/theyhe/she/it
have been keepinghas been keeping
I/he/she/it/we/you/they
will have been keeping
keep -> содержать