确保一句中有且仅有一个谓语动词
错例：It is unclear recycling can control pollution.
正解：It is unclear whether recycling can control pollution.
改错练习：
1. It is advertising makes us buy something impulsively.
2. There are two line charts show the unemployment rate fluctuates in China.
3. The percentage of families have one car increased greatly.
雅思写作常见错误之时态
中文中没有时态的概念，这是我们在学习和掌握英语时态的天然障碍。对于一般现在时，现在完成时，一般过去时的合理使用实在是难煞了一堆烤鸭。
错例1：Itis obvious that comparing with its drawbacks， the rise of English as aglobal language can bring us a lot of benefits.
很明显的是，相对于它的弊端，英语作为全球性语言的崛起会带给我们更多的益处。(被动)
正解：Itis obvious that compared with itsdrawbacks， the rise of English as a global language can bring us a lot ofbenefits.
错例2：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3：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4：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.
改错练习：
1. The increasing violence showing in films or on television has sparked public outcry， and some critics have shown their concern on the interplay of social violence and media violence.
