Question

16．你應(yīng)該準(zhǔn)時(shí)到．讓人家久等是不禮貌的．
You have to go there on time．It's not polite to keep others waiting for you so long．

Answer 1

分析 It's not polite to keep others waiting for you so long．

解答 答案：It's not polite to keep others waiting for you so long．表達(dá)的是客觀事實(shí)用一般現(xiàn)在時(shí)，表示做某事是怎樣的用it's+adj+to do sth，禮貌的polite，故It's not polite to，讓某人一直做某事keep sb doing sth，他人others，等某人wait for sb，時(shí)間久so long，故答案是It's not polite to keep others waiting for you so long．

點(diǎn)評(píng) It is adj+of sb to do sth 
答：1）for sb．常用于表示事物的特征特點(diǎn)，表示客觀形式的形容詞，如easy，hard，difficult，interesting，impossible等：
　　 It's very hard for him to study two languages．對(duì)他來說學(xué)兩門外語是很難的．
2）of sb的句型一般用表示人物的性格，品德，表示主觀感情或態(tài)度的形容詞，如good，kind，nice，clever，foolish，right．
　　 It's very nice of you to help me．你來幫助我，你真是太好了．