雅思考试备考时首先要做的就是积累一定的词汇量，在雅思写作中，也有一些常用的和必备的词汇需要我们掌握。今天雅思写作必备词汇及25个常用词汇来帮助各位考生备考。
1、趋势类词汇
上升动词类：increase,goup,riseup,growup,jumpup,surge,shootup,keepanupwardtendency
下降动词类：decrease,godown,decline,falldown,drop,sink,dip,keepadownwardtendency
波动动词类：fluctuate
持平动词类：remain the same,stabilize,remain stable,remain constant
修饰动词的副词：slightly轻微地，slowly缓慢地，gradually逐渐地，steadily稳定地，rapidly迅速地，moderately温和地，轻微地，significantly明显地，sharply明显地，dramatically急剧地，drastically急剧地
上升名词类：increase,rise,growth,jump,surge
下降名词类：decrease,decline,fall,reduction,drop
波动名词类：fluctuation
修饰名词的形容词：slight,slow,gradual,steady,rapid,moderate,significant,sharp,dramatic,drastic
2、极值类词汇和表达
最高点：reach the peak/top/highest point
Increase to the peak/top/highest point(所有上升类的动词都可以替换掉increase)
最低点：reach the bottom/lowest point
drop to the bottom/lowest point(所有下降类的动词都可以替换掉drop)
占的最多：occupy/make up/take up/account for the largest proportion/number/percentage of…
占的最少：occupy/make up/take up/account for the smallest proportion/number/percentage of…
3、倍数的表达方式
Double是两倍/大一倍
Increase/decrease three times增长/减少了三倍
4、大约的表达方式
About/around+数字
数字+orso
Approximately+数字
5、常用的小作文的趋势句式表达
句式一：变化主体/图画中主体+趋势动词+副词+时间区间
Eg:The number of aged people over 65 increased significantly from 1940-2000.
The number of aged people over 65 dropped slightly from 1960-1980.
The number o faged people over 65 fluctuated between 1 million and 1.2 million from 1940-1950.
The number of aged people over 65 remained stable from 1930-1940.
句式二：There be+形容词+表示趋势的名词+in+变化的主体+时间区间
Eg:There was an significant increase in the number of aged people over 65 from 1940-2000.
There was a slight decline in the number of aged people over 65 from 1960-1980.
There was a fluctuation between 1 million and 1.2 million from 1940-1950
25个常用词汇：
琐碎的，不重要的，微不足道的--trivial frivolous superficial trifling worthless
轻视，贬抑--disdain despise reject scorn contempt derogate disparage depreciate
嘲笑，嘲讽--deride mock ridicule scorn sneer quip flout hack jape persiflage taunt
容易冲动的--impetuous hasty headlong rash brash passionate precipitate reckless
理论家，空谈家--doctrinaire pedant theorist
残忍的，野蛮的--ferocious bloodthirsty brutal cruel fierce vicious wild atrocious
邪恶的，有害的，致命的--sinister diabolic corrupt forbidding pernicious virulent
秘密的，偷偷的--cryptic furtive covert covered hidden hideaway shelter veileds
避难所--asylum haven home institution refuge shelter harbor
节约的--frugal prudent saving economical sparing thrifty abstemious stint
浪费的，挥霍的--prodigal extravagant lavish spendthrift wasteful squander
浪费时间，逗弄，嬉戏--dally dawdle delay lag linger loiter
祝福，感谢--benediction bless bliss blessing
欺骗，诈骗--deceive beguile dupe hoax mislead trick bamboozle cheat delude hoodwink
逃避工作--malinger goldbrick relinquish
揭密，泄漏--uncover disclose expose open reveal unmask
掠夺，抢劫--loot predate rob pillage plunder sack spoil despoil burglarize angle
诽谤，中伤--aspersion slander derogate calumniate libel discredit denigrate
赞扬--extol compliment glorify laud praise commend acclaim eulogize eucomium
颂词，表扬--laud eulogy ode hymn
反对，不赞成--demur deprecate dissent dissident
否认，拒绝，驳斥-- contradict dispute refute renounce naysay reject repudiate gainsay
哀悼，后悔，哀叹--deplore bemoan regret lament dirge bewail repent
驱逐，出境--deport banish expel expatriate evict exile oust exclude ostracism
以上就是五类雅思写作必备词汇及25个常用词汇的全部内容，大家一定要全部掌握，预祝大家在考试中取得理想的成绩。