It作形式主语常见句型1.It + be +形容词+ that-从句可用于此句型的形容词有: wonderful, true，good，right，wrong，（un）important，useless，surprising，disturbing,frightening,alarming,clear，unusual，lucky，certain, necessary等。 如： It is quite certain that he will be at the meeting.他将出席会议是无疑的。 It is surprising that he came late to school this morning.他今天早上迟到真令人惊讶。 It is important that we (should) study hard.我们努力学习是很重要的。注意: 该句型中的形容词是（un）important, necessary等时，从句应为 (should )+动词原形。It is important that we (should) learn Engl
