Question

15．Wearen't supposed to laugh at person who is in the trouble．（不应该嘲笑处于困境中的人）（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．这里是说客观事实用一般现在时，表示应该做某事be supposed to，主语是we，故用are，后加上not、表否定，故aren't supposed to．嘲笑laugh at，后加宾语person 人，单数，我们将preson作为先行词，用定语从句来修饰，表示处于困境的人，关系代词用who指人，作为从句主语，处于困境用be in trouble故答案是aren't supposed to laugh at person who is in the trouble．

点评 be supposed to 的用法
用法一：be supposed to…其中to是动词不定式符号，不是介词，其后要跟动词原形．当be supposed to…的主语是"人"时，意为"应该…
"；"被期望…"，它可以用来表示劝告、建议、义务、责任等，相当于情态动词should．如：
Everyone is supposed to wear a seat-belt in the car．每个人在汽车里都应该系安全带．
用法：当be supposed to…的主语是"物"时，它表示"本应；本该"，用于表示"某事本应该发生而没有发生"．如：
The new laws are supposed to prevent crime．这些新法令本应该起到防止犯罪的作用．
用法三：be supposed to后面接"have+过去分词"时，表示"本应该做某事而没做"．如：
You are supposed to have handed in your homework by now．现在你应该已经把作业交上来了．
用法四：be supposed to…的否定结构为be not supposed to…，它常用于口语中，意为"不被许可；不应当"．如：
You are not supposed to smoke on the bus．你不应该在公共汽车上吸烟