what time與 when 都可以表示“什么時(shí)候”.
前者所表示的時(shí)間比較精確,指“幾點(diǎn)鐘”,“幾時(shí)幾分”;
后者所表示的時(shí)間范圍廣,有時(shí)也可指“幾點(diǎn)鐘”,“幾點(diǎn)幾分”,用來(lái)代替what time.
例如：
"What time(When) does your mother go to work?" “你母親什么時(shí)候去上班?”
"She goes to work atseven" “她七點(diǎn)去上班.”
"When will he come back?".“他什么時(shí)候回來(lái)?”“
"He'll come back tomorrow ”他明天回來(lái).”
此外,what time還可以用作名詞,作主語(yǔ)或介詞賓語(yǔ).
簡(jiǎn)單的說(shuō)：
when和what time的區(qū)別在于what time問(wèn)具體的時(shí)間,如某一天的幾點(diǎn)鐘,甚至幾分鐘,而when問(wèn)的時(shí)間比較籠統(tǒng).因此在問(wèn)生日日期時(shí),不要用“what time”這個(gè)特殊疑問(wèn)詞而應(yīng)該用when.