... play - cannot but ( không cách nào hơn là) - Had better ( nênthì hơn) Ex:You had better work - Let/ help / make/ have + SO+ V-( bare infinitive) Ex: - My father let me drive my car - He help ... perfect Form S+ had+ P.P + An action happened /completed before another action in the past. It is often introduced with conjunctions like: when, after, as soon as, by the time that. Eg: Tom ... Form: S+ verb (bare-infinitive) (he/she/it + verb-s/es) + Express routines ,states, facts and things that are true for a long time, habitual/repeatd action. Schedules, time-tables,thoughts...