look for 后面加什么形式

　　They look for beauty.

　　他們要尋找美感。

　　First of all, astronomers look for a star.

　　首先，天文學(xué)家要尋找一顆恒星。

　　"You don't have to look for dates online," she said.

　　“你不必在網(wǎng)上尋找約會對象�！彼�說。