practice the conversations为什么conversation要加s?

Practice makes perfect 请问make为什么要加s? practice makes perfect 为什么make要加“s” lots of practice后面的practice为什么不加s? "Listen and complete the conversations.Then practice with yo make conversation还是make conversations Do you ever practice conversations with friends?现在要用. Practice the conversation in the picture above.Then make oth 英语翻译1.Practice the conversation below,Use the information in 翻译"conversation practice" Do you ever practice conversations with friend为什么在这里有ever却不用 Do you ever practice conversations with friends? Make conversations using the information .为什么用using