后面加什么has

一般来说 have / has 后面不直接加动词原形；当“有”讲时，后面加名词，如 I have a book ；用作助动词，构成现在完成时时，后面加过去分词，如 I have finished my homework/ She hasfinished her...have/has/had+动词的过去分词表示现在完成时和过去完成时

例句

Her service has improved.

她的发球有了提高。

The water has gone cold.

水已变凉。

The stream has dried up.

小溪已经干涸了。

Vegetarianism has been mainstreamed.

素食主义已为大多数人所接受。

Wearing fur has become unfashionable.

穿裘皮服装已经变得不流行了。