爱迪生十二岁之前就开始自己谋生 了 by the time he was twelve, Edison had began to make a living by himself. Student(Times
爱迪生十二岁之前就开始自己谋生 了。 By the time he was twelve, Edison had began to make a living by himself
过去进行时 1过去进行时的基本用法主要表示过去某一时 间正在进行的动作 如:他看书时睡着了。 He fell asleep when he was reading 我们昨天一直在等你。 We were expecting you yesterday 我在做功课时他在玩。 He was playing while I was studying Student(Times
1.过去进行时的基本用法主要表示过去某一时 间正在进行的动作。 如：他看书时睡着了。 He fell asleep when he was reading. 我们昨天一直在等你。 We were expecting you yesterday. 我在做功课时他在玩。 He was playing while I was studying. 过去进行时
2.过去进行时表示现在用过去进行时表示现 在主要是为了使语气委婉、客气。 如:我不知你能否让我搭一下车。 I was wondering if you could give me a lift Student(Times
2. 过去进行时表示现在用过去进行时表示现 在主要 是为了使语气委婉、客气。 如：我不知你能否让我搭一下车。 I was wondering if you could give me a lift
3.过去进行时表示感情色彩与现在进行时相似, 过去进行时也可表示满意、称赞、惊讶、厌恶 等感情色彩,也通常与 always. forever. continually等副词连用 如:他们老是吵架。 They were always quarrelling. 这个男孩子老是问东问西的 The boy was continually asking questions Student(Times
3. 过去进行时表示感情色彩与现在进行时相似， 过去进行时也可表示满意、称赞、惊讶、厌恶 等感情色彩，也通常与always, forever, continually等副词连用。 如：他们老是吵架。 They were always quarrelling. 这个男孩子老是问东问西的。 The boy was continually asking questions
4动词be的过去进行时也可表示过去一时的 表现或暂时的状态。比较。 如:他很友好。 (指过去长期如此) He was friendly 他当时显得很友好。 (指当时一时的表现) He was being friendly. Student(Times
4. 动词be的过去进行时也可表示过去一时的 表现或暂时的状态。比较。 如：他很友好。 (指过去长期如此) He was friendly. 他当时显得很友好。 (指当时一时的表现) He was being friendly