4.
(+) Danny remembers to phone his father on Sundays.
(-) Danny doesn't remember to phone his father on Sundays.
5.
(+) They do their homework after school.
(?) Do they do their homework after school?
Giải thích:
4.
`->` Thì hiện tại đơn:
(+) S(she, he, it) + V(e/es) + ...
(-) S(she, he, it) + doesn't + V(infi).
5.
`->` Thì hiện tại đơn:
(+) S(they, we, i) + V(infi)
(?) Do + S(they, we, i) + V(infi)