S主词 Vi不及物动词 Vt及物动词 SC主词补语
O受词 OC受词补语 IO间接受词 DO直接受词
S + Vi + SC
David is my younger brother. David是我的弟弟。
He is a smart boy. 他是个聪明的孩子。
My father is a math teacher. 我父亲是数学老师。
John and Mary are in love. John跟Mary谈恋爱了。
He often complains about his low salary. 他常常抱怨薪水太低。
I'm afraid of cockroaches. 我怕蟑螂。
The problem is that I don't know him. 问题是我不认识他。
I'm sure he doesn't like cheese. 我确定他不喜欢起司。
She is always quick to react. 她一向反应很快。
It's sure to rain. 一定会下雨。
Don't be afraid to ask questions. 别怕问问题。