ad-lib造句

1、I lost my notes and had to ad-lib the whole speech.
我把讲稿丢了，只好临时说了一通。

2、he made a few ad-lib remarks
他说了几句即兴的评论。

3、Throughout the plan she had to ad-lib constantly.
在整个计划中，她不得不经常无准备地做。