spent、spend

spent和spend的用法,区别 “spent”和“spend” 在用法上的区别. “He spent 2 hours playing the piano.”中为什么用“spend”的过去式“spent” I spent two hours on my homework一句中spend为什么要用过去式spent 英语问题I spent 5 dollars on the book这里的spend为什么要变成spent 每天花在看电视的时间 英文 the time spent(还是spend) watching TV every day Who do you advise ___ less time on games?B.spent C.to spend she (spent)two hours practicing playing basketball.（）是spend的 spend用法i spent one hour and a half ____________ this bool ye 为什么spent是错的,不是要spend的过去式吗?那里错了? A.How long did you spend there?B.We spent two days there.为什么 They went home when they{ }(spend)all their money.用spent 还是h