1. I am never late for school. (never (adv.) không bao giờ)

2. They don't usually go swimming in winter. (usually (adv.) thường xuyên)

3. The children are often interested in games (often (adv.) thường thường)

4. What do you usually do in your free time? 

5. My father sometimes helps me do my homework. (sometimes (adv.) thỉnh thoảng)

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- Thì hiện tại đơn:

+, To be:

( + ) S + am/is/are + (adv.) + ...

( - ) S + am/is/are + not + (adv.) + ...

( ? ) (WH-words) + am/is/are + S + (adv.) + ...?

+, Verb:

( + ) S + (adv.) + V(s/es)

( - ) S + do/does + not + (adv.) + V-inf

( ? ) (WH-words) + do/does + S + (adv.) + V-inf ?