Therebeingnobuses，wehadtowalkhome.
=becausetherewerenobuses，wehadtowalkhome.
Therehavingbeennorainforalongtime，thecropsinthefielddied.
=becausetherehadbeennorainforalongtime，thecropsinthefielddied.
(有连词用句子，没有连词用therebe独立主格形式作状语)
Therebe句型的非谓语形式：
Idon’twanttheretobeanymisunderstandingsbetweenus.
What’sthechanceoftherebeinganelectionthisyears？
It’snotunusualfortheretobeagenerationgapbetweenteachersandstudents.
Thereisnopoint/senseindoingso.
53.It’suptosbtodo…..由…..来；靠….来…
Whetherwegiveuporgoonwiththeexperiment，it’salluptoourtutorprofessortodecide.
It’suptoyoutobabysitmysonwhenIamawayonbusiness.
Beuptosth胜任，从事于
Michaelisnotreallyuptothatjob.
Theyarewhisperinginthecornerasiftheyareuptonogood.
54.do，does，did用于一般现在时或一般过去时强调谓语动词
对比：
Heisanall-aroundstudent.//Hedoesbeanall-aroundstudent.
Hetookgreatpainstohelpus.//hedidtakegreatpainstohelpus.转自:考试网 - [Examw.Com]
Becareful！//Dobecareful！
Youteenagersdomakegreatdifferencetoyourparents.
