He （ spends ）half an hour ( in )playing basketball every day為什么后面是in?似乎有點(diǎn)讀不通(我很菜的，別見怪)若表示"在......上花費(fèi)(時(shí)間、金錢等)",常用句型spend some money/ some time on sth.,介詞on后接名詞或代詞。例如: Kitty spends two hours on her homework every day. Kitty每天花兩個(gè)小時(shí)做家庭作業(yè)。若表示"花費(fèi)(時(shí)間、金錢等)做某事",則常用句型spend some money / some time (in) doing sth.,此時(shí)第二個(gè)動(dòng)詞要用動(dòng)詞-ing形式,介詞in可以省略。例如: They spent 4450 yuan buying the big colour TV set. 他們買那臺(tái)大彩電花了4450元。