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I used to, used to old habits, i used to, i used to do this, but now i don´t

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It is used to say something like: I used to do, i used to work in that company, i used to play soccer, it is fot those types of things that people used to do

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Example:
+ I used to eat onion
- I did use to

See here!!

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I did not use to eat onion.

In negative form it remains

Did i use to eat onion?

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The used to in three ways

Be used to ( with the verb be )

Get used to ( get used to something )

Used to ( someone used to do something but now they no longer do it or had something and no longer has it )

The topic we are on...
Used to : before but not anymore

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Let´s take another example:

I used to smoke

Let´s check this

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We used to hate each other

They used to be friends

He used to exercise every day

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THANK YOU!!