128. He hasn't phoned his parents for 3 months.

        The last time he phoned his parents was 3 months ago.

        It's 3 months since he phoned his parents.

129. He used to take them to the park ( ctruc used to+V)

        He doesn't take them to the park anymore.

130. If you don't run fast, you will have a problem with him (câu đk loại 1)

131. If you stay up late, you wil feel tired (câu đk loại 1)

132. If he doesn't open the door, I will come back home. (Unless chuyển sang If thì phải ngược lại á, kiểu khẳng định -> phủ định)

133. If you don't keep silent, our teacher will come here.(or cũng như unless nhoa)

134. Unless it rains tomorrow, I will go out (mình tạm dịch như này nha : Trừ khi ngày mai trời mưa nếu k tôi sẽ ra ngoài, nếu khó hỉu thì b có thể dịch ngược lại như kiểu : ngày mai tôi sẽ ra ngoài trừ khi trời mưa)

135. They haven't phoned us since we came here ( since + QKĐ)

136. If you aren't quiet, they teacher will come here.

137. The lesson was so difficult that he couldn't learn.

        It was such a difficult lesson that he couldn't learn. (cách 1 tạm thời mình vẫn chưa nghĩ ra huhu)

I