Question

15．Wearen't supposed to laugh at person who is in the trouble．（不應該嘲笑處于困境中的人）（laugh）

Answer 1

分析 aren't supposed to laugh at person who is in the trouble．

解答 答案：aren't supposed to laugh at person who is in the trouble．這里是說客觀事實用一般現(xiàn)在時，表示應該做某事be supposed to，主語是we，故用are，后加上not、表否定，故aren't supposed to．嘲笑laugh at，后加賓語person 人，單數(shù)，我們將preson作為先行詞，用定語從句來修飾，表示處于困境的人，關(guān)系代詞用who指人，作為從句主語，處于困境用be in trouble故答案是aren't supposed to laugh at person who is in the trouble．

點評 be supposed to 的用法
用法一：be supposed to…其中to是動詞不定式符號，不是介詞，其后要跟動詞原形．當be supposed to…的主語是"人"時，意為"應該…
"；"被期望…"，它可以用來表示勸告、建議、義務、責任等，相當于情態(tài)動詞should．如：
Everyone is supposed to wear a seat-belt in the car．每個人在汽車里都應該系安全帶．
用法：當be supposed to…的主語是"物"時，它表示"本應；本該"，用于表示"某事本應該發(fā)生而沒有發(fā)生"．如：
The new laws are supposed to prevent crime．這些新法令本應該起到防止犯罪的作用．
用法三：be supposed to后面接"have+過去分詞"時，表示"本應該做某事而沒做"．如：
You are supposed to have handed in your homework by now．現(xiàn)在你應該已經(jīng)把作業(yè)交上來了．
用法四：be supposed to…的否定結(jié)構(gòu)為be not supposed to…，它常用于口語中，意為"不被許可；不應當"．如：
You are not supposed to smoke on the bus．你不應該在公共汽車上吸煙