這可沒有規(guī)定.
一般來講,下列動(dòng)詞帶it 再跟賓補(bǔ)的情況多些：
一、感官動(dòng)詞或使役動(dòng)詞.
I find it hard to finish the task in 3 days.我發(fā)現(xiàn)三天之內(nèi)完成這項(xiàng)任務(wù)很難.
The teacher made it clear that everyone must plant more thatn 5 trees.老師已經(jīng)說得很清楚了,每個(gè)人都必須至少栽五棵樹.
二、think,consider,suppose等與思想有關(guān)的實(shí)義動(dòng)詞.如：
I think it interesting to dance .我認(rèn)為跳舞很有趣.
三、like,love,hate等表示喜怒哀樂的詞.如：
I hate it that he is so lazy.我討厭他的懶惰.
I hate it when my mother asks me to eat eggs.我不喜歡我媽媽要我吃雞蛋.
四、某些動(dòng)詞短語.如：
We owe it to you that there wasn't a serious accident.多虧了你,才沒有發(fā)生嚴(yán)重的事故.
這個(gè)it是形式賓語,真正的賓語在賓補(bǔ)之后.如：