用于主语从句中 It is important (strange/natural/necessary/ vital /necessary/important/urgent/imperative/ natural/essential/ desirable/) that…( should)+V原形”,表示某事“重要” “奇怪”,“自然”,“必要”等意义。 eg. It is important that every member(should) inform himself of these rules It is necessary that he(should) be sent there at once. It is decided (has been decided) that the meeting (should)be postponed till tomorrow“It is important （strange/natural/necessary/ vital /necessary/ important/ urgent/ imperative/ natural/ essential/ desirable/ ） that …( should )+V.原形” ，表示某事“重要”， “奇怪”，“自然”，“必要”等意义。 eg. It is important that every member (should) inform himself of these rules. It is necessary that he (should) be sent there at once. It is decided (has been decided) that the meeting (should)be postponed till tomorrow. 用于主语从句中