has become。因?yàn)閔as后面要接動(dòng)詞的過(guò)去分詞形式，動(dòng)詞become的過(guò)去分詞是become，became是動(dòng)詞become的過(guò)去式。become作及物動(dòng)詞時(shí)意為“成為；變得；變成”，第三人稱(chēng)單數(shù)變化是becomes；現(xiàn)在分詞形式是becoming。

has become的例句

The environment has become a very hot issue.

環(huán)境已成為很熱門(mén)的話(huà)題。

The Internet has become part of everyday life.

互聯(lián)網(wǎng)已成為日常生活的一部分。

The new office block has become an expensive white elephant.

這座新辦公大樓成了昂貴的擺設(shè)。

May Day has become a venerable institution

五朔節(jié)已經(jīng)變成一個(gè)神圣莊嚴(yán)的傳統(tǒng)節(jié)日。

The programme has become a firm favourite with young people.

這個(gè)節(jié)目已著實(shí)贏得了年輕人的喜愛(ài)。

become相關(guān)短語(yǔ)

become rich疾速致富；迅速致富；火速致富；神速致富

become extinct滅絕；變壞；絕種

has become成長(zhǎng)為；已經(jīng)成為；已變成；已經(jīng)變成

become conscious醒悟；恢復(fù)知覺(jué)

become weak手發(fā)軟；變得萎靡不振；倦?。蛔?nèi)?/p>

become invalid作廢；成為無(wú)效；變得無(wú)效；這藥已失效了