take one's turns to do sth 和 It'one's turn to do sth 这两个句子对吗?主要是第一个句子为什么turn要加s,第二个不加?

take turns to do sth ; of one 's own; want sb.to do sth take to one's Let's take turns to read our fact sheets.里的take turns 为什么不能用take turn to Let's take turns to read our fact sheetsfact 是take turns to to 还是take turns doing? Take turns to p____ on the sticks to the next one. take one's turns to do sth 和 It'one's turn to do sth 这两个句子对吗?主要是第一个句子为什么turn要加s,第二个不加? It's a long wayso it's best for us to take turns _ take turns to do sth 这个句型里“turn”为什么要加S啊? Take turns to talk about Dave's family.中文怎样翻译? take turns,read.to.,on top of. take turns to do 还是doing take turns to do sth造句 take turns to do 的翻译 5.take turns to等于什么 take turns to add sentences翻译 take turns to do例句如题要中文翻译, Take turns