過去將來時的基本特征，也就是我麼年今天所談到的“立足過去，著眼未來”。它表示從過去某一時間來看將要發(fā)生的某個動作或存在的某種狀態(tài)。例如：Mary told me that she would go to Shanghai by plane.那麼過去將來時態(tài)的搆成是什麼呢？它都有哪些用法呢？ 基本搆成—— A ) would + 動詞原形 如He asked me if I would stay here. 他問我是否要待在這兒。 B ) was / were going to + 動詞原形 如No one knew when he was going to finish his homework. C ) was/ were ( about ) to + 動詞原形 如：He said that they were to leave at six. She said that the meeting was about to begin.