stay -> оставаться
Образование времен (Действует субъект! - Актив т.е. действительный залог):
  Past - ПрошлоеPresent - НастоящееFuture - Будущее
Simple - Факт
I/he/she/it/we/you/they
staid
did stay
----
did not stay
did'nt stay
I/we/you/theyhe/she/it
staystays
do staydoes stay
----
do not staydoes not stay
do'nt staydoes'nt stay
I/he/she/it/we/you/they
will stay
 
----
will not stay
won't stay
Continous - процесс
I/he/she/itwe/you/they
was stayingwere staying
----
was not stayingwere not staying
Ihe/she/itwe/you/they
am stayingis stayingare staying
----
am not stayingis not stayingare not staying
 is'nt stayingare'nt staying
I/he/she/it/we/you/they
will be stay
----
will not be stay
won't stay
Perfect - Завершенность
I/he/she/it/we/you/they
had staid
----
had not staid
had'nt staid
I/we/you/theyhe/she/it
have staidhas staid
----
have not staidhas not staid
haven't staidhasn't staid
I/he/she/it/we/you/they
will be staid
----
will not be staid
won't be staid
Perfect Continous - Процесс в периоде
I/he/she/it/we/you/they
had been staying
I/we/you/theyhe/she/it
have been stayinghas been staying
I/he/she/it/we/you/they
will have been staying
stay -> оставаться