mistake, its or it's

[TheFinalRevolution]

general rule concerning

Thanks
David

[Humble]

Hi, David,
It's just a piece of cake. when you contract is or has, you need the apostrophe:
David's come = has come.
David's here = is here.
The weather is fine. It's fine.
The vase has been broken. It's been broken.
When it is a pronoun, no apostrophe:
The dog wagged its tail.
The sentence is long, I can't understand its structute.
Hope it helps.

[TheFinalRevolution]

Hey, thanks for the reply. Helps out a bunch.

David

[RobbieCook]

Humble is correct.

"It's" simply means "it is" or "it has". For example:

It's very cold today.
It's rained today.

"Its" is a possessive pronoun. For example:

The dog licked its fur.
The cat cared for its kittens.

[BobK]

Yes - as Humble says, it's a piece of cake (when you think about it). But I find I have to think about it quite often. My favourite memory-aid is that the possessive "its" deserves an apostrophe no more than "his".

b