Tenses

• past tense

(+) S + V2  + O + C
ex : i studied english yesterday
(-) S + didn't + V1
ex : i didn't study english yesterday
(?) did + S + V1
ex : did i study english yesterday

• present tense

(+) S + V1
(-) S + dont + V1
(?) do + S + V1
ex :
i go to campus every morning
i dont go to campus every morning
do i go to campus every morning

(+) S + V1 (es/s)
(-) S + doesn't + V1
(?) does + S + V1
ex :
she goes to campus every morning
she doesn't go to campus every morning
does she go to campus every morning

• present perfect

- subjek 
i/you/we/they
he/she/it

- have/has+Verb (V3)
heve met
has lived

-rest of sentence
him before
here for three years

• Modal                                                                          Modal Like

must                                                                                 had better  = Sebaiknya
migh                                                                                 have to = Harus
may                                                                                   Ought to = Harus
shall
can
wil
should