Other verbs + in
drop in =
visit somebody for a short time without arranging to do this- I dropped in to see Chris on my way home.
join in =
take part in an activity that is already going on- They were playing cards, so I joined in.
plug in an electrical machine =
connect it to the electricity supply- The fridge isn't working because you haven't plugged it in.
fill in a form, a questionnaire etc. =
write the necessary information on a form- Please fill in the application form and send it to us by 28 February.
You can also say
fill out a form.
take somebody
in =
deceive somebody- The man said he was a policeman and I believed him. I was completely taken in.
Other verbs + out
eat out =
eat at a restaurant, not at home- There wasn't anything to eat at home, so we decided to eat out.
drop out of college, university, a course, a race =
stop before you have completely finished a course/race etc.- Gary went to university but dropped out after a year.
get out of something that you arranged to do =
avoid doing it- I promised I'd go to the wedding. I don't want to go, but I can 't get out of it now.
cut something
out (of a newspaper etc.)
- There was a beautiful picture in the magazine, so I cut it out and kept it.
leave something
out =
omit it, not include it- In the sentence 'She said that she was ill', you can leave out the word 'that'.
cross something
out / rub something
out- Some of the names on the list had been crossed out.