talking about the future
You use soon to say that something will happen in a short time from now.
Dinner will be ready soon.
He may very soon be leaving the team.
talking about the past
You use soon to say that something happened a short time after something else in the past.
The mistake was very soon corrected.
The situation soon changed.
position in sentence
• Soon is often put at the beginning or end of a sentence.
Soon unemployment will start rising.
I will see you soon.
• You can also put soon after the first auxiliary verb in a verb phrase. For example, you can say ‘We will soon be home’. Don't say ‘We soon will be home’.
It will soon be Christmas.
The show was soon being watched by more than 16 million viewers.
• If there is no auxiliary verb, you put soon in front of the verb, unless the verb is be.
I soon forgot about our conversation.
I soon discovered that this was not true.
If the verb is be, you put soon after it.
She was soon asleep.
You use how soon when you are asking how long it will be before something happens.
How soon do I have to make a decision?
How soon are you returning to Paris?
‘as soon as’
You use as soon as to say that one event happens immediately after another.
As soon as she got out of bed, the telephone stopped ringing.
As soon as we get the tickets, we'll send them to you.