Phrasal verb: keep to

keep to /(keep to a diet)

Picture source: www.health.com   
Meaning: If you keep to something like a limit, a budget or a schedule, you don't go over it or outside it.

For example:

• keep to sth If we don't keep to our budget, we won't have enough money left over to pay the rent.
  
• keep to sth It's important to keep to the schedule or we'll start having problems.
  

Nouns often used as objects with
keep to: budget, limit, schedule, timetable, route, plan

Quick Quiz:

We kept to our annual budget, so at the end of the year we

had plenty of money were short of money had to borrow money www.englishclub.com

Click for answer a.