【僮媛】評論
助動詞 (should , would , could...)+ 原 V
【業精於勤，事立於豫】評論
(考文法)(十秒解題)You should ________ your supervisor right away when an accident happens. (當意外發生，你應該要立刻打電話給你的上司。)(A) be calling → (X) should be + V-ing 是指「當下要做，但沒做」。(B) call → should + 原形V 是指「建議...」。(C) have called → (X) should have 是指「原本應該...(但事實上沒有)」。(D) to call → (X) should + 原形V。