is all about the words 'assure', 'ensure' and 'insure'.

They're often confused because 

they sound very similar.

'To assure' means 'to remove any doubt'.

It's followed by an object pronoun, for example:

'My friend assured me that 

he would come to the party.'

'To ensure' means 'to make sure 

that something happens'.

This verb is not followed by an 

object pronoun, for example:

'I called the bakery to ensure the 

cake would be ready for the party.'

'To insure' means 'to protect something

with an insurance policy', for example:

'I insured my car against theft.'