买东西时怎么说谢谢英语

To say "thank you" when you buy something in English, you can say:

"Thank you"
"Thank you very much"
"Thanks a lot"
"I really appreciate it"

For example, if you are buying something at a store, you could say to the cashier: "Thank you for your help. Have a nice day."

You can also show your appreciation by saying "Thank you" to the person who is helping you or by expressing gratitude in other ways, such as by saying "I really appreciate your assistance." It is always polite to thank the person who is helping you, whether you are buying something or not.