How long,how much time,how many hours 多長時(shí)間,多少時(shí)間,幾個(gè)小時(shí)?
How often 是多么經(jīng)常,多長時(shí)間發(fā)生一次.
help 動(dòng)詞原形,
helpful形容詞,有助的,
helped 過去時(shí),過去分詞.He helped me before.He has just helped his mother cook dinner.
helps 一般現(xiàn)在時(shí),第三人稱,動(dòng)詞原形后面加 s.He helps his mother cook dinner everyday.請(qǐng)問help helpful helps helped這些什么意思呢？哪個(gè)用來形容同學(xué)呢？某同學(xué)對(duì)你很有幫助：He (She) is very helpful to me (to other people/to us).