雅思大作文的結構論述一般是同學們比較頭疼的一個問題，今天我們就具體來分析一下一篇好的雅思大作文的主體段的論證，應該怎麼樣進行展開。
我們來看一個整體的例子！
正面觀點1
To begin with, one of the major functions of advertising is to assist consumers to find and buy suitable products.
正面觀點2
What is also worth noticing here is that advertising serves to stimulate consumption and contributes to economic development.
反面觀點
In spite of its importance, there is no denying that every now and then, advertising leads customers into an impulsive purchase, thereby causing wasteful spending.
拓展例題的第一個分支觀點：
正面觀點1
To begin with, one of the major functions of advertising is to assist consumers to find and buy suitable products.
支持句1
Common knowledge is that advertising refers to presenting information relevant to a product or service by a variety of media, such as television, radio, newspaper, magazines, brochures and so forth.
支持句2
With the presence of advertising, a consumer is able to acquire the latest information in the market, such as features of a product or service, and thereby making a wiser buying decision.
支持句3
By contrast, without advertising, a consumer is at the risk of purchasing a product that fails to meet all of his or her needs, because of lack of knowledge of better alternatives in the market.
拓展例題的第二個分支觀點：
正面觀點2
What is also worth noticing here is that advertising serves to stimulate consumption and contributes to economic development.
支持句1
As said before, advertising is responsible to introduce a product, but in reality, it does more than that.
支持句2
Advertising describes a product in such an impressive way and with adding so many visual appeals that it always succeeds in attracting the eyes of the customers and driving them into a final purchase.
支持句3
In addition, advertising reminds the intended customers of their existing needs or create fresh needs, keeping them aware that only by purchasing a product can their needs be met.
支持句4：
By these two approaches, advertising encourages spending and contributes to economic development.
拓展例題的第三個分支觀點：
反面觀點
In spite of its importance, there is no denying that every now and then, advertising leads customers into an impulsive purchase, thereby causing wasteful spending.
支持句1
It is a shared convention in the advertising industry that some properties of a product are highlighted while the others are simplified.
支持句2
A product, when promoted well, will be highly desired by many, as customers are misguided to ignore the products』 downsides.
支持句3
It accounts for why many shoppers regret their buying decisions before long, observing that what they have bought is not what they actually need or fails to live up to their expectations.
支持句4
Cosmetics and dietary supplements are among those typical examples, costing buyers a lot but not achieving desirable outcomes.
我們可以看到，在這三個段落的論證的分支結構當中，他的邏輯和觀點都是很明確的，並且他在支持距地三到四句話當中的內在隱含邏輯是層層遞進的。
並且，這是符合邏輯的論證，並且是考官比較喜歡看到的一種分析類型，所以同學們在寫雅思大作文的過程當中，也應該儘量去借鑑好的文章是怎麼樣寫作的，並且儘可能去進行模仿，然後再超越，不能夠毫無目標地去學習。
如果同學們有任何學習和留學方面的問題或困惑，歡迎隨時諮詢我們A加未來的老師，我們很樂意給大家提供幫助，解答大家的問題。