Grammar time - Verbs in the subjunctive

Certain expressions and verbs such as demand,insist,propose,recommend,request ,and suggest are followed by the subjunctive.The subjunctive uses the base form of the verb.It is generally used in formal language to express a wish or necessity.

I think consumers need to insist (that) advertisements be truthful every aspect.

Some ads seem to demand (that)the consumer buy the product.

These expressions are frequently followed by the subjunctive:

It is crucial                  It is essential                 It is imperative

It is vital                     It is important                It is critical

I believe it is essential that an ad be clever and witty in order to be effective.

در مثال های بالا،فعلی که بعد از فاعل قرار گرفته است ساده است و اگر فعل را غیر از حالت ساده قرار دهیم جمله از لحاظ گرامری نادرست خواهد بود.

نکته دیگر این که بعد از افعالی که در بالا به آن ها اشاره شد،فاعل با اسم خواهد بود یا ضمیر.به مثال زیر توجه کنید:

I demanded he buy a new jacket.(pronoun)