【文章內(nèi)容簡介】
joy oneself。 doing 【 學(xué)以致用 】 ① The children are having a great time ______(play)in the water. ② They are having a great time at the party. (改為同義句 ) They are ______ ______ at the party. They are ______ ______ at the party. 答案: ① playing ② having fun。 enjoying themselves 3. on a vacation 在度假 ◆ My family and I are on a vacation in the mountains. 我和我的家人在山里度假 。 ◆ They are going on a vacation to Sanya. 他們要去三亞度假 。 【 探究總結(jié) 】 介詞 on 表示活動(dòng)的用法 介詞 on 常用來表示活動(dòng)或狀態(tài) , 如 on a vacation (holiday)/on a trip/on sale 在度假 /在旅行 /降價(jià)出售 。 【