过去进行时中的陈述句为什么I was 而不是用I were

过去进行时中的陈述句为什么I was 而不是用I were When I was watching TV,my brother did his homework.主句为什么用过去时,而 不用过去进行时? i was being 是过去完成进行时吗那它为什么不是过去被动进行时呢 while引导句子怎么判断Grandma was cooking breadfast while I was washing my face this morning.中的过去进行时was cooking 可不可以换过去时cooked 为什么? i suddenly realized that the teacher （was referring）to 为什么用过去进行时? I was having trouble getting along with my parents这里 为什么 要用 过去进行时 而不是现在完成进行时 过去进行时中的什么时候用was什么时候用were 过去进行时.主语+was/were+vimp[at.yesterday]1陈述句2一般疑问句3肯定回答/否定回答. 英语翻译great content was recovering 为什么用过去进行时? I was walking along the street when I met an old friend of mine.这句话的意思?为什么前面主句用的是过去进行时 而从句又用一般过去时? when和while有什么区别?怎么课本的是 I did my homework while I was reading a book.而 练习是 I was而 练习是 I was doing my homework while I was reading a book.究竟是前后都是过去进行时 还是while加过去进行时啊?.. i was wondering if you could tell me how to fill outthis form.这里前面为什么用过去进行时? i suddenly realized that the man was speaking to me这个句子为什么一定用过去进行时 I thought he studied hard.He told me his son was watching TV.为什么前一句用过去时后一句用进行时? She (was dropping) the tray when I spoke to her.为什么前半部分过去进行时,后半部分过去时I was speaking to her不是也可以表示过去吗 AS i was writing a letter ,Robert is came to visit me.为什么前面用过去进行时,后面用过去时 过去进行时He________(walk) home when the rain __________(begin).为什么答案是was walking和began而不用was beginning呢? She (was dropping) the tray when I spoke to her.为什么前半部分过去进行时,后半部分过去时She (was dropping) the tray when I spoke to her.为什么前半部分是过去进行时,后半部分是过去时?而不是前半部分是过去