Some differences between American and British English

Pronunciation in British English:

The classic example is of course the AH sound in tomato (sounds like to-MAY-to in American English).

Many words have a distinctly British or American pronunciation:

vaccine in British sounds like VAC-seen (VAC-sin in American).

In British English the r is pronounced only before a vowel.

In the phrase far away we hear the r .

So in burn, lord, over it is silent! 

In American English the r is always pronounced.

The t between vowels stays t (so it doesn't sound like d): 

writer (rider), better (bedder), matter (madder).

The (main) vowels are usually lengthened in American English:

cancel, racket, hand, kid, sit, phoTOgraphy.

Spelling differences (American spelling in brackets):

catalogue (catalog), centre (center), colour (color), travelling (traveling)

Grammar:

Have you heard the news? (Did you hear the news).

I have already fed the dog (I already fed the dog).

Have you got an e-bike? Yes, I have (British English only).

Do you have an e-bike? Yes, I do (both American and British English).

Things have got better recently (have gotten better in American English only).

(On the telephone) Hello, is that Susan? (Hello, is this Susan).

He's going out somewhere (going some place).

I'm staying at home (staying home).

He looked at me really strangely (really strange).

I shall/will let you know (American English never uses shall instead of will).

Shall I call the doctor? (Should I call the doctor?)

Learned, burned can also be written learnt, burnt in British but not so in American English).

Go and get washed, go and take a look (Go get, go take).

Words and Expressions

And then there are numerous words and expressions that differ:

tap (faucet), boot of car (trunk), sweets (candy), university (college), different from (different than),

underground (subway), lorry (truck)