sebutkan rumus simple present tense dan simple past tense!mohon bantuannya...

Simple Present
S+V(es/s) +Objek/Compliment
Simple Past
S+V2+Objek

Rumus simple present tense :
(+) S + V + O
(-) S + do/does + not + V + O
(?) Do/does + S + V + O.

ingat : 
perhatikan subjek ! 
kalau subjeknya he, she, it.. perhatikan verb-nya
she reads  a book
i read a book.

she doesn't read the book.
i don't read a book.

Rumus simple past :
(+) S + V2 + O
(-) S + did not + V + O
(?) Did + S + V + O

she wrote a letter.
she did not write a letter.

I wrote a letter
I did not write a letter.