... ………………………………………………………………………………. 2. S + started / began / came + V –ing / to – Vo / N + time ago. S + has / have V 3,ed + since / for + time S + has / have +been + Ving + since / for + time Ex : I started working ... đã cho có từ want, need, intend S + V + in order ( not ) to S + V + so that + S + can / will ( not ) Vo ( hiện tại ) so as ( not ) to + Vo # S + V + so that + S + could / would ( not ) Vo ( quá ... ra ở quá khứ ) S + V 2 , ed 3. Before + S + V 2/ ed , S + had + V 3 , ed # After + S + had + V 3,ed , S + V 2/ ed 4. Since S + V 2/ ed , S + have / has + V 3,ed Note : - Before he went to bed,...