1.（2014全国一卷61题）：It 61 (be)imaginable that it could be ever cleaned up. （was），我来为大家科普一下关于高考英语必考使役动词用法?以下内容希望对你有帮助!
高考英语必考使役动词用法
一、近年高考真题对be动词的考查题1.（2014全国一卷61题）：
It 61 (be)imaginable that it could be ever cleaned up. （was）
2.（2014全国二卷61题）：
One morning, I was waiting at the bus stop, worried about 61 (be ) late for school. （being）
3.（2015全国一卷67题）：
Yangshuo 67 (be) really beautiful. (is)
4.（2016全国二卷63题）：
Leaving the less important things until tomorrow 63 (be) often acceptable.(is)
5.（2016全国三卷69题）：
Confucius believed knives would remind people of killings and 6 9 (be) too violent for use at the table.（were）
6.（2017全国一卷67题）：
Fast food 6 7 (be) full of fat and salt; by eating more fast food people will get more salt and fat than they need in their diet.(is)
7.（2018全国一卷64题）：
While running regularly can’t make you live forever，the review says it 64 (be) more effective at lengthening life than walking, cycling or swimming.(is)
8.（2019全国一卷70题）：
Of the nineteen recognized polar bear subpopulations, three are declining, six 70 (be) stable, one is increasing, and nine lack enough data.(are)
9.（2019全国二卷61题）：
A 90-year-old has been awarded “Woman Of The Year” for 61 (be) Britain’s oldest full-time employee ─still working 40 hours a week.（being）
二、be动词用法总结1、作为系动词（link verb）
be动词作为系动词起到连接主语与表语的作用，有人称、数量与时态等形式变化：(is; are; am; was; were)。
2、助动词（auxiliary verb）
be动词作为助动词，构成被动语态（be done）和进行时态（be doing）,be动词作为助动词同样有人称、数量与时态等形式变化：(is; are; am; was; were)。
3、非谓语动词(non-finite verb)
be动词的非谓语形式包括： being; been; to be; having been。
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