英语句法问题The boy under the tree looked sad.The flower smells sw

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英语句法问题
The boy under the tree looked sad.
The flower smells sweet.
这两句都是主谓宾吗?如果不是,那是什么

不是、是主系表.
系动词亦称连系动词Link Verb,作为系动词,它本身有词义,但不能单独用作谓语,后边必须跟表语（亦称补语）（形容词）,构成系表结构说明主语的状况、性质、特征等情况.
1、状态系动词
用来表示主语性质或状态,只有be一词.
2、持续系动词
用来表示主语继续或保持一种状况或态度,主要有keep, rest, remain, stay, lie, stand.
3、表像系动词
用来表示“看起来像”这一概念,主要有seem, appear, look.
4、感官系动词
感官系动词主要有feel, smell, sound, taste.
5、变化系动词
这些系动词表示主语变成什么样,变化系动词主要有become, grow, turn, fall, get, go, come, run.
6、终止系动词
表示主语已终止动作,主要有prove, turn out, 表达“证实”“变成”之意.

英语句法问题The boy under the tree looked sad.The flower smells sw The flower smells well. The flower smells---. who's the boy( )under the tree The flower smells well 还是 the flower smells good the boy under the tree is ...跟 the boy is under the tree的区别 A boy is standing under the tree The boy under the tree is mending the bike?(对under the tree提 The boy under the tree is hungry under the tree 是什么成分修饰谁的 The boy under the tree is Li Lei?(就under the tree提问） _____ _ the flower smells good 与the flower smelling good the boy reading under the tree is very goog at