learning things is like sailing a boat against the current为什么加上is能聚其他的例子吗（不是be done 和 be doing吗,不能learning things like sailing a boat against the current 吗is在这里做什么成分,还有sail不是vi吗?能

learning things is like sailing a boat against the current为什么加上is能聚其他的例子吗（不是be done 和 be doing吗,不能learning things like sailing a boat against the current 吗is在这里做什么成分,还有sail不是vi吗?能
learning things is like sailing a boat against the current为什么加上is能聚其他的例子吗（不是be done 和 be doing吗,不能learning things like sailing a boat against the current 吗is在这里做什么成分,还有sail不是vi吗?能加宾语吗?
2楼说 :没is不是没谓语了吗?
如果去掉is like也是谓语啊

learning things is like sailing a boat against the current为什么加上is能聚其他的例子吗（不是be done 和 be doing吗,不能learning things like sailing a boat against the current 吗is在这里做什么成分,还有sail不是vi吗?能
1.先划分下句子成分
(learning things) is like (sailing a boat against the current )
试比较 he is like your father.
短语 learning things 做主语
小句 sail a boat against the current 做宾语
2.sail 既是vi.又是 vt.