think -> думать
Образование времен (Действует субъект! - Актив т.е. действительный залог):
  Past - ПрошлоеPresent - НастоящееFuture - Будущее
Simple - Факт
I/he/she/it/we/you/they
thought
did think
----
did not think
did'nt think
I/we/you/theyhe/she/it
thinkthinks
do thinkdoes think
----
do not thinkdoes not think
do'nt thinkdoes'nt think
I/he/she/it/we/you/they
will think
 
----
will not think
won't think
Continous - процесс
I/he/she/itwe/you/they
was thinkingwere thinking
----
was not thinkingwere not thinking
Ihe/she/itwe/you/they
am thinkingis thinkingare thinking
----
am not thinkingis not thinkingare not thinking
 is'nt thinkingare'nt thinking
I/he/she/it/we/you/they
will be think
----
will not be think
won't think
Perfect - Завершенность
I/he/she/it/we/you/they
had thought
----
had not thought
had'nt thought
I/we/you/theyhe/she/it
have thoughthas thought
----
have not thoughthas not thought
haven't thoughthasn't thought
I/he/she/it/we/you/they
will be thought
----
will not be thought
won't be thought
Perfect Continous - Процесс в периоде
I/he/she/it/we/you/they
had been thinking
I/we/you/theyhe/she/it
have been thinkinghas been thinking
I/he/she/it/we/you/they
will have been thinking
think -> думать