improvement的动词形式是improve。improvement作为名词，含义为“改善”、“改进”、“改进处”、“改善的事物”；improve作为动词形式，含义为“改进”、“改善”。

improvement作为名词，其动词形式为improve，意为改善;改进;改进处;改善的事物。例句有：

1、Sales figures continue to show signs of improvement.

销售额持续显示出增加的迹象。

2、This is a great improvement on your previous work.

你的工作比先前有很大进步。

3、The new Prime Minister is an improvement on his predecessor...

新上任的总理比他的前任要强。

4、We shall be looking for an improvement in your work this term.

我们期待你这学期功课有进步。

5、Predictions of an early improvement in the housing market proved false.

认为房屋市场很快就有好转的预测结果证明是错误的。

6、It's only a small improvement, but at least it's a step in the right direction.

虽然这只是小小的改进，但至少是朝正确方向迈出的一步。

7、We've forked out a small fortune on home improvements over the years.

这些年来我们花了许多钱做房屋装修。

8、The system we introduced in 1980 has been a great improvement.

我们1980年引进的系统有了很大改进。

9、An improvement in living standards could be years away

可能多年之后生活水平才能得到提高。

10、The change did not portend a basic improvement in social conditions.

该变化没有预示社会状况的根本改观。