fit的过去时是fitted或fit。过去时和过去分词是一样的。它属于重读闭合音节。它应该在后缀-ed后面加上双字母T，也就是fitted。合身的基本含义是“合身”，主要是指尺寸和型号的合身。它也可以指“适合”的条件、环境、目的和要求，并扩展到“胜任”。
fit过去式为什么有两种
fit的过去式和过去分词在美式英语中是fit，在英式英语中是fitted，美式英语中有时也使用fitted，如：We fitted the new lock on the door.
fit用作动词时，后面不能与to或for连用;有时用过去分词形式作表语：例如：A woman may go into any line of work for which she is physically fitted. 妇女可以做任何体力上能胜任的工作。
“保持健康”用keep fit。 示例：She tries to keep fit by running every day.她每天跑步以保持健康。
fit表“适合, 合身”时，可作及物动词，fit sb.表示“适合某人”示例：I can't find clothes to fit me.我找不到合身的衣服。
fit也可作不及物动词，后面不跟宾语。 示例：That jacket fits well. 那件短上衣很合身。
fit双语例句
The sash, kimono, and other garments were made to fit a child.
腰带、和服和其他衣服都是儿童款的。
Eventually he was happy that the sills and doors were a reasonably good fit.
门槛和门扇算是贴合良好，他终于开心了。
She was being fitted for her wedding dress.
她正在试穿婚纱。
He folded his long legs to fit under the table.
他把两条长腿蜷起来伸进桌下。
She fitted her key in the lock.
她把钥匙插进锁孔。