explain -> объяснять
Образование времен (Действует субъект! - Актив т.е. действительный залог):
  Past - ПрошлоеPresent - НастоящееFuture - Будущее
Simple - Факт
I/he/she/it/we/you/they
explained
did explain
----
did not explain
did'nt explain
I/we/you/theyhe/she/it
explainexplains
do explaindoes explain
----
do not explaindoes not explain
do'nt explaindoes'nt explain
I/he/she/it/we/you/they
will explain
 
----
will not explain
won't explain
Continous - процесс
I/he/she/itwe/you/they
was explainingwere explaining
----
was not explainingwere not explaining
Ihe/she/itwe/you/they
am explainingis explainingare explaining
----
am not explainingis not explainingare not explaining
 is'nt explainingare'nt explaining
I/he/she/it/we/you/they
will be explain
----
will not be explain
won't explain
Perfect - Завершенность
I/he/she/it/we/you/they
had explained
----
had not explained
had'nt explained
I/we/you/theyhe/she/it
have explainedhas explained
----
have not explainedhas not explained
haven't explainedhasn't explained
I/he/she/it/we/you/they
will be explained
----
will not be explained
won't be explained
Perfect Continous - Процесс в периоде
I/he/she/it/we/you/they
had been explaining
I/we/you/theyhe/she/it
have been explaininghas been explaining
I/he/she/it/we/you/they
will have been explaining
explain -> объяснять