Differences in American and British English Grammar

These two varieties of English are very similar that most American and British speakers can understand each other without great difficulty. There are, however, a few differences of grammar, vocabulary and spelling. The following guide is meant to point out the principal differences between American English (AE) and British English (BE).

Use of the Present Perfect

The British use the present perfect to talk about a past action which has an effect on the present moment. In American English, both simple past and present perfect are possible in such situations.

• I have lost my pen. Can you lend me yours? (BE)
• ....

A Guide to Punctuation

Full stop / Period

The punctuation mark full stop (.) [UK: full stop, USA: period] is used to close sentences. A new sentence that follows a full stop has a capital letter.

Honesty is the best policy.
Sweet are the uses of adversity.
A friend in need is a friend indeed.

Full stops are also used in writing abbreviations. This is becoming less common in British English.

Examples:
oz. for ounce (s)
Prof. for professor
i.e. for "in other words" or "that is"
e.g. for "for example"

Question marks

Question marks (?) are used to close direct questions. A new sentence that follows a question mark has a capital letter...

 شرح كامل گرامر زبان انگليسي كه بيشتر مسائل گرامري را به زباني ساده  و همراه با مثال  است در فايلي به فرمت پي دي اف جمع آوري كردم .جهت دانلود نمودن فايل و  همچنين آگاهي از موضوعات شرح داده شده در اين فايل به  ادامه مطلب برويد.   

IN

Use 'in' with spaces:

• in a room / in a building
• in a garden / in a park

Use 'in' with bodies of water:

• in the water
• in the sea
• in a river