短語(yǔ)詞組短語(yǔ)have yet to be improved 有待改進(jìn)have yet to be proved 有待證明have to be solved 尚需解決I have to be late 我討厭遲到have to be further researched 還需進(jìn)一步研究They have to be imaginative 那么他們有些想象力 返回 have to be