n.凸邊；溝

the woman is going to buy it. the man is going to write. the girl is going to eat the food. i am going to chimb the leader. i am wrinting. he is eating. 用肯定特征和否定特征分別描述六個(gè)人要做什么，以及他們正在做什么： 一個(gè)女人、一個(gè)男人、一個(gè)女孩、一個(gè)男孩、你和我。例如：那個(gè)男人要買一輛轎車。那個(gè)女人正在買花。