1、spend变成过去式为spent.I spent five minutes cleaning my room yesterday.Did you spend five minutes cleaning my room yesterday.
2、spending现在分词。He is spending his holidays.Is spending his holidays?
3、have/has spent现在完成时.He has spent five years teaching English.
pend变形词
pend动词的四种形式分别是：现在分词 spending 过去分词 spent 主语是三人称单数时动词 spends 动词原型 spend
