Phrasal Verbs consist of a verb plus a particle:
verb + adverb or verb + preposition or verb + adverb + preposition.
The meaning of this combination is mostly very different from the verb and the adverb or preposition alone.
There are no rules that might explain how phrasal verbs are formed correctly - all you can do is look them up in a dictionary and study their meanings.
In fact many phrasal verbs are metaphorical, and if you understand the metaphors they use, it will be easier to understand and remember their meanings.
Phrasal verbs are mainly used in spoken English and informal texts.
Many phrasal verbs are transitive, meaning that they take an object. Other phrasal verbs can stand alone (intransitive verbs).
Some phrasal verbs are separable (the verb and the preposition can be separated, putting the object in the middle), while others are inseparable (the object must come at the end because the verb and the preposition must stay together).
Separable verb:
Correct: Put on your coat.
Correct: Put your coat on.
Inseparable verb:
Correct: Get on a bus.
Incorrect: Get a bus on.

Phrasal verbs with IN, their meanings and examples

IN/INTO is a preposition opposite of OUT.

Many phrasal verbs with IN and INTO mean INSIDE:
Ask in - To invite somebody into your house. We asked them into the house.
Back into – To move backwards, or make someone or something move backwards. She backed into a doorway to let the crowds pass by.
Barge in - Enter a place and interrupt. Oh! I'm sorry. I didn't mean to barge in on you.
Bash in - Break, damage or injure by hitting. Don't bash the door in!
Book in - Make a reservation in advance. He’s booked himself in at a health spa.
Breathe in - draw in air, inhale. It hurts when I breathe in.
Check in - Register on arriving at a hotel or at the airport. Have you checked in yet?
Come in – Arrival time for flights, trains. What time does his train come in?
Dig into - Reach inside to get something. She dug her fingernails into my wrist.
Dip in - Put something in a liquid or into a container for a short time. I dipped into the sour cream with a potato chip.
Drive in - arrive by a car. The minister and his secretary drive in today from their motor tour across the country.
Eat in - Eat at home. Let’s eat in tonight.
Fill in - Complete a form/Substitute someone at work. Please fill in this form.
Fit in - Get on in a group of people/Have enough time or space for something. She fitted in with her new colleagues straight away.
Get in - Arrive (train, plane, etc.)/Arrive home/Enter a car or taxi/Arrive at work, school, home/Enter a building or place. His train gets in at 11.30 p.m.

Hack into - Break into a computer system. He hacked into the government database and stole a lot of data.
Keep in - Not allow someone out. They were kept in after school.
Key in - Enter numbers or information into a computer or electronic system. Key in your name and password.
Let in - Allow someone to enter. Could you go down and let Mary in?
Live in - Live in the place where you work or study. Their nanny lives in.
Lock in - Lock a place to stop someone leaving. You can’t keep me locked in.
Log in/into - Enter a restricted area on a computer system. Have you logged in lately?
Move in - Start living in a place. The crowds are moving in.
Plug in - Connect machines to the electricity supply. Then I realized I hadn’t plugged the TV in.
Stay in - Not go out. I think I’d rather stay in tonight.
Wait in - Stay at home because someone is going to visit. I have to wait in for a delivery this morning.

Butt in – Interrupt. She kept on butting in with silly comments.
Chuck in - Quit something/Make a comment. I chucked in a few points at the end of the discussion.
Cut in – Interrupt. During the debate my opponent kept cutting in.
Jump in - Enter a conversation. I wish you'd stop jumping in and finishing my sentences for me all the time.
Step in - Get involved by interrupting something. It is time for the government to step in.

Contract in - Become involved or committed to something. Have you contracted in to the pension scheme?
Count in - Include or involve. ‘There’s a party on Saturday.’ – ‘Count me in!’
Draw into - Get involved in something. Don't draw me into this argument.
Enter into - Become involved in or accept. After college, she entered into politics.
Get into - Become involved or interested/Be accepted or admitted. She’s really getting into the Internet.
Hook into – Connect something to something. Users can hook into the network with phones or computers.
Jockey into - Persuade someone into doing something. The bosses were eventually jockeyed into signing the union agreement.
Land in - Get someone into trouble. His criminal activity finally landed him in jail.
Muscle in/into - Become involved in something when your involvement is not invited. I hear Mark's muscled in on our meeting.

Opt in/into - Choose to be part or a member of something. Members are given the choice to opt in.
Reel in - Attract people, especially customers, to get them to do what you want them to. Their excellent pizza is reeling customers in.
Rope in - Get somebody to help. At the last minute, we roped in a couple of spectators to complete the team.
Settle in - Get used to. She seems to have settled in quickly at her new company.
Share in - Have a part in a project, activity, etc. When the company began to make money, everyone working there shared in the profits.
Shut in - Prevent someone from leaving. I shut the cat in until it was time to go to the vet.
Sign in - Register in a hotel/Open a computer program that requires a name and password/Write your name when entering a place. All visitors must sign in at the front desk.
Suck in/into - Become involved in something. I really don't want any part in this whole argument, but I can feel myself being sucked into it.
Take in - Absorb information/Include something. This list takes in all the members, past and present.
Throw in - Join, accompany, support, join forces with. His friends warned him against throwing in the street gang.
Wade in - Start something or get involved, often without thinking or to forcefully. She just waded in and gave the kid a smack.

Bump into - Meet by chance. I bumped into your mother at the supermarket.
Call in - Stop and visit. I called in to see Mark yesterday.
Look in - Make a quick visit. Can you look in on Mary and see if she needs anything from the supermarket?
Pop in - Visit for a short time. Why don’t you pop in and see us this afternoon?
Run in - Pay a casual visit/have a disagreement. I ran into the store for a loaf of bread.
Stop in - Stay at home/Visit briefly. I stopped in at work on the way home to check my mail.

Come into - Inherit. She expected to come into a fortune when she turned twenty-one.
Look into - Research, investigate. They are looking into the causes of the accident.
Sink in - Slowly come to be understood. I heard what you said, but it took a while for it to sink in.
Talk into - Persuade someone to do something. The salesman talked us into buying the car.
Turn into – Become. They want to turn the offices into apartments.