错例：Evidencesuggests that the poor are fail to seek medical treatment because of the cost.

　　证据表明穷人因为费用的问题而不能得到治疗。(进行时)

　　正解：Evidencesuggests that the poor are failing to seek medical treatment because of the cost.

　　错例：Airpollution and other kinds of pollution become worse as a result of theincreasing traffic.

　　空气污染和其他污染的恶化是交通流量加大的结果。

　　Become一般用完成时或进行时

　　正解：Air pollution and other kinds of pollution have become worse as a result of the increasing traffic.

　　错例：Alack of job opportunities restrict school leaver's independence， either forcing them to remain at home and forcing them to move back home.

　　缺乏工作机会限制了离校生的独立性，迫使他们留在家里或者搬回家里住。

　　用将来时态，将会，表意愿

　　正解：Alack of job opportunities will restrict school leaver's independence， either forcing themto remain at home and forcing them to move back home.

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