在环球教育（原环球教育）刘瑾怡老师的教学过程中发现，雅思写作中经常需要用到涉及数量的表达，而以下几组短语因为外形相仿，部分考生往往因为粗心混用而导致语法出错。

　　＋ 可数名词[C]

　　the number of + [C]

　　… …的数目

　　a number of + [C]

　　一些、许多

　　＋ 不可数名词[U]

　　the amount of + [U]

　　… …的数目

　　an amount of + [U]

　　一些、相当数量的

　　可在number, amount前添加形容词，使其数量产生程度变化，如：small, large, considerable, significant, substantial … …

　　In the year of 2010, the number of houses in the village was up to 900.

　　2010年，村里房子的数量已经达到了900间。

　　Tokyo, which has only 155 kilometers of route, serves the greatest number of passengers per year, at 1,927 million passengers.

　　东京，路线只有155公里长，却服务了年度最大的客流量，达到19.27亿个乘客。

　　The proponents of people changing their jobs regularly deem (that) this practice is beneficial and it brings about a substantial number of merits.

　　支持方认为人们定期换工作这种做法是有益的并且会带来很多优势。

　　A significant number of examples have demonstrated that mixing work with adequate rest contributes to physical and mental health.

　　大量实例表明劳逸结合有助于身心健康。

　　The graph illustrates changes in the amounts of beef, lamb, chicken and fish consumed in a particular European country between 1979 and 2004.

　　该图表展现了1979至2004年期间某一欧洲国家牛肉、羊肉、鸡肉和鱼肉的数量变化。

　　The amount of information accessible today is far more than that in the past owing to the technological stride.

　　由于科技的进步，今天所获得信息的数量远远超过以前。

　　It is clear that government has levied a large amount of money from citizens in the hope of striking a balance in society and shrinking the gap between the rich and the poor.

　　显然政府从居民身上征收大量金钱是为了平衡社会和缩小贫富差距。

　　Since work experience has been given precedence in a wide range of professions, people with a substantial amount of experience relating to their job will have a higher likelihood of being successful.

　　因为许多行业都非常重视工作经验，所以拥有大量相关工作经验的人获得成功的几率会更大。