Thì hiện tại đơn:

(+) S + V (es,s) + O

(-) S + doesn't / don't + V + O

(?) Do / Does + S + V + O

Bị động THTD:

(+) S + tobe + Vpp + (by O)

(-) S + tobe + not + Vpp + (by O)

(?) Tobe + S + Vpp + (by O)

- (+) My father buys that book

=> That book is bought by my father

- (-) Chales doesn't ride the bike every day

=> The bike isn't ridden by Chales every day

- (?) Do they write a letter for him every day?

=> Is a letter for him written every day?

(+)S + am/is/are + PII + (by O)

VD: Lipsticks are often collected by my sister. (Những thỏi son thường được sưu tầm bởi chị tô

(-) S + am/is/are + not + PII + (by O)

VD: This task isn’t done. (Công việc này chưa được làm xong.)

(?)- Am/is/are + S + PII + (by O)?

VD : Is this letter written by Anna?