spent过去式

spent过去式 how were you spend your weekendspend 应该换成过去式 spent I spent two hours on my homework一句中spend为什么要用过去式spent “He spent 2 hours playing the piano.”中为什么用“spend”的过去式“spent” I had spent the summer in staying at home中为什么had用了过去式spent还要用过去式啊 spent. 为什么spent是错的,不是要spend的过去式吗?那里错了? spent、spend1.I spent ten yuan ——bags那“——”那儿是填buying还是boughting也就是说spent是过去式那后面的动词是不是也要变成过去式再加ING she (spent)two hours practicing playing basketball.（）是spend的过去式吗?这里为什么要用一般过去时? I spent the whole day in my room,but I did not write a single card!write为什么不用过去式? 过去式 过去式! 过去式, 过去式, 过去式. 过去式. 过去式, 过去式!