Claire had her luggage checked before her plane left中主句为什么不用

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/06 00:59:07

Claire had her luggage checked before her plane left中主句为什么不用过去完成时

因为后面的before her plane left是个明显表示过去时间的短语,所以主句用一般过去时
再问：但是主句的动作不是发生在left之前吗
再答：这个要看你是否想强调了，如果你想强调说“Claire在她的那班飞机起飞前已经让人检查过行礼了”，即强调过去的过去，也可以用过去完成时，说Claire had had her luggage checked before ... 时态这东西看似简单，其实很多时候很让人费解，建议你买本张道真英语语法大全精编本看下。

Claire had her luggage checked before her plane left中主句为什么不用 Claire had luggage _______ an hour before her plane left claire had her luggage checked an hour before he I had known her long before. 为什么要用过去完成时? checked luggage是什么意思 1.—You should have thanked her before you left. -You should have thanked her before you left. —You should have thanked her before she left. you should have thanked her before you left. work on it had begun before she left.这里为什么不用worked 不是过去发生的嘛为什么不用had left,arrived?而用left,arrived. she realized she had left her backpack at