1.It is+形容詞+for sb. to do sth. “某人做某事是……” 如:
It is very easy for me to work out the chemistry problem. 解出這道化學題對我來說很容易。
It is important for us to master a foreign language. 我們掌握一門外語是很重要的。
也有這樣的句型: It is /was+形容詞+不定式 “做某事是……”
如:It is wonderful to travel in that great forest. 在那片大森林里旅行,真是太美了。