spend,take,cost,pay都是一个意思,但有什么不同?

spend是花，主语是人
take是花了，主语是物
cost也是花了，主语是物，和take一样
pay是付了，主语是人

pay表示付钱,如I pay 10 yuan for this book.

spend花费时间/金钱/精力等,I spent 2 hours on reading the book. She spent 100 yuan on the ticket. He spent his whole life on research.
*pay/spend的主语均为人

take表示做某事需花费多少时间/金钱,如It takes you 10 minutes to walk from here to there.
cost的用法和take非常相似,This book costs 10 yuan.
*take/cost的主语为物

*spend sth in doing...