“is not”的缩写是“isn't”。例如，“This is not my book”可以缩写为“This isn't my book”或“This isn't my book”。类似的缩写还有如下：- are not = aren't- was not = wasn't- were not = weren't- has not = hasn't- have not = haven't- will not = won't- would not = wouldn't- should not = shouldn't- could not = couldn't
