Idioms
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.
Idiom:
get behind
Meaning:
to fail to maintain a desired pace or level of progress, to become late
Example:
If you get behind with your homework you will not pass your courses.
List of common idioms, their meanings and examples of their usage in sentences
Idioms can be a powerful linguistic tool only when they are used in the right way in the right places.