動詞時態

狀態 時間	simple	continuous	perfect	perfect continuous
present	1does; do	2am/is/are + doing	3has/have + done	4has/have + been doing
past	5did	6was/were + doing	7had done	8had been doing
future	9shall/will + do	10shall/will + be doing	11shall/will + have done	12shall/will + been doing
funture in the past	13should/would + do	14should/would + be doing	15should/would + have done	16should/would + been doing