here is a great information about the difference between alot, a lot and allot...
try not to forget it
There is often confusion over the words alot, a lot and allot.
The word alot does not exist. It is often mistakenly written instead of a lot.
I know alot about precious stones. WRONG
I know a lot about precious stones. RIGHT
The term a lot is the opposite of a little. As a noun, lot means a large extent, a large amount, or a large number. As an adverb, lot means to a great extent or to a great degree. It nearly always appears in the form a lot.
Mark has a lot of toys.
(Lot is a noun in this example.)
He cheats a lot.
(Lot is an adverb in this example.)
The verb to allot means to give out, to apportion, to divide, or to distribute. (Other forms of the verb are allots, allotted, and allotting.)
The peasant was allotted just 25m2 to grow his monster pumpkins.
I will allot a radio to each group.
You need to allot each syndicate sufficient time to question the presenter.
LOT CAN BE A NOUN OR AN ADVERB
Noun. The noun lot means a large extent, large amount, or large number. It is most often seen in the form a lot.
I know a lot of cool pubs in Brighton.
I know a bunch of cool pubs in Brighton.
(Evidence that lot is a noun – just like bunch.)
Adverb. The adverb lot means to a great degree or great extent. It is most often seen in the form a lot.
I run a lot.
I run regularly.
(Evidence that lot is an adverb – just like regularly.)