一英语基本句型-1主系表结构/S (主）+（lv)( 系动词）+ P（表）
本结构是由主语+系动词+表语组成，主要用以说明主语的特征，类属，状态，身份等。系动词有:
1.表示特征和存在状态的：be, seem, feel, appear, look, smell, taste, sound;
2.表示状态延续的：remain, stay, keep, continue, stand;
3.表示状态变化的：become, get, turn, go, run, fall, come, grow;
如：Our English teacher is thirty years old.
The cake tastes delicious.
We feel used to living in big cities.
The potatoes went bad in the fields.
Their boss seems satisfied with the work.
Deep water stays still.
巩固练习1：
1．冬季白天短，夜晚长
2．十五岁他就成为有名的钢琴家了。
3．孩子们很少保持安静。
4．她的工作是在幼儿园里照看儿童。
5．他失业了。
