我是问: r后面加sb.还是sth.?回答:for+ 后面是sb.还是sth.?回答:to+动词原形或动名词,of和for+sb.
这个得看具体的意思了，It is +adj.+for sb to d= It is +adj.+for sb doing
都行,意思是"该某人做~~~的了" 例如:
It is time for you to do/doing homework !
翻译:该你做作业的时候了.
It is +adj.+of(表示一个人品质,个性等) sb to do
例如:It is very kind of you to help me .
翻译:你真善良,这样的帮助我
dosth.
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