You use and to link two or more words, groups, or clauses.
When he returned, she and Simon had already gone...
Between 1914 and 1920 large parts of Albania were occupied by the Italians...
You use and to link two words or phrases that are the same in order to emphasize the degree of something, or to suggest that something continues or increases over a period of time.
Learning becomes more and more difficult as we get older...
Day by day I am getting better and better...
You use and to link two statements about events when one of the events follows the other.
I waved goodbye and went down the stone harbour steps...
He asked for ice for his whiskey and proceeded to get drunk.
You use and to link two statements when the second statement continues the point that has been made in the first statement.
You could only really tell the effects of the disease in the long term, and five years wasn't long enough...
The cure for bad teaching is good teachers, and good teachers cost money.
You use and to link two clauses when the second clause is a result of the first clause.
All through yesterday crowds have been arriving and by midnight thousands of people packed the square.
You use and to interrupt yourself in order to make a comment on what you are saying.
As Downing claims, and as we noted above, reading is best established when the child has an intimate knowledge of the language...
Finally — and I really ought to stop in a minute — I wish to make the following recommendations.
You use and at the beginning of a sentence to introduce something else that you want to add to what you have just said. Some people think that starting a sentence with and is ungrammatical, but it is now quite common in both spoken and written English.
Commuter airlines fly to out-of-the-way places. And business travelers are the ones who go to those locations.
You use and to introduce a question which follows logically from what someone has just said.
'He used to be so handsome.' — 'And now?'...
'Well, of course, they haven't won a football game.' — 'And what would you expect?'.
And is used by broadcasters and people making announcements to change a topic or to start talking about a topic they have just mentioned.
And now the drought in Sudan...
Football, and Aston Villa will reclaim their lead at the top of the English First Division.
You use and to indicate that two numbers are to be added together.
What does two and two make?
And is used before a fraction that comes after a whole number.
McCain spent five and a half years in a prisoner of war camp in Vietnam.
...fourteen and a quarter per cent.
You use and in numbers larger than one hundred, after the words 'hundred' or 'thousand' and before other numbers.
We printed two hundred and fifty invitations.
...three thousand and twenty-six pounds.
There is relatively little information about and, maybe you can watch a bilingual story to relax your mood, I wish you a happy day!