7、ng(有趣的),impossible(不可能的)等。例如,It’snoteasyforthemtolearnaforeignlanguage.(=Tolearnaforeignlanguageisnoteasyforthem.)对于他们来说学好一门外语不容易。It’sveryimportantforstudentstolistentoteacherscarefully.(=Tolistentoteacherscarefullyisveryimportantforstudents.)对于学生来说上课认真听老师讲课是非常重要的。 It