1. (should)+动词原形

It +be动词+形容词(-able)(essential, odd, vital, absurd, regrettable, desirable…)+that从句It +be动词+名词(pity,shame…)+that从句

It +be动词+过去分词(ordered, begged, voted, moved…)+that从句部分名词/动词(表示建议，劝告，决定等) +that从句

2. It’s (high, about) time that +动词过去式would rather +动词过去式

真题剖析

(1997) … I wouldn’t be truthful if I　47　say that teaching is hard work . …47.

A. do

B. did

C. don’t

D. didn’t

(1993)…The Cairo newspapers the next day carried banner headlines about the student demonstration　52 , and they　53　that the professor be sent home.

53. A. ordered

B. pleaded

C. decided

D. demanded

(2003.3) It is edifying, and it is a source of inner satisfaction even __54__ other facets of life prove disappointing.

(even if other facets of life should prove disappointing.)

54.A. shall

B.will

C.would

D.should