1. You ought to brush your teeth before going to bed.
ought to= should: nên
2. Ba takes part in this activity.
parcipate in=take part in: tham gia
3. Nga is a safe cycler.
S+V(s/es)+adv (trạng từ)-> S+am/is/are+adj(tính từ)+N(danh từ)
4. Tom plays tennis badly.
S+am/is/are+adj(tính từ)+Ndanh từ)-> S+V(s/es)+adv(trạng từ)