关于一般过去式的问题
现在语法多了好多都忘了,特别是过去时
比如;
1.he said he palyed basketball yesterday.
后面的play用不用过去式,为什么、
2.he wanted to show me his hat yesterday.
其中是want加ed还是show加ed,还是只是want加ED.为什么,和1句对比讲下
3.we came by several villages during the trip.
后面的during为何不用过去式?
4.she locked the door and left for the concert
后面的leave为什么要用过去式 ,和3的句对比讲下.