第三人称动词:be-doing的形式,一般在动词后加-ing,重读闭音节最后一个双写加-ing,以e结尾的把e结尾去掉加-ing,课本最后几页(单词前几页)应该有吧.
Look,the children(are)very happy.children是复数,所以用are.
第三人称动词:be-doing的形式,一般在动词后加-ing,重读闭音节最后一个双写加-ing,以e结尾的把e结尾去掉加-ing,课本最后几页(单词前几页)应该有吧.
Look,the children(are)very happy.children是复数,所以用are.