Present Continuous Present Perfect Simple Past
I am sleeping I have (already ) slept I slept last night.
We are writing letters now. we have written letters We wrote letters last week
They are helping my father, They have already helped my father, They helped my father yesterday.
You are studying very hard, You have already studied very hard, You studied very hard.
She is studying very hard, She has studied very hard, She studied very hard.
PRINCIPLE PARTS OF VERB
Present Past Past participle Present Participle
study, studied, studied, studying
eat, ate eaten eating
write wrote written writing
walk walked walked walking
see saw seen seeing
The Tense
(am/is/ are + ...ing(present participle) (has/have + past participle)
simple present present continuous present perfect
I eat I am eating I have eaten
She writes She is writing She has written
They walk They are walking They have walked
