Up a tree
Falling head over heals in love
Fall on deaf ears
Fall into your lap
Fall through the cracks
Bark up the wrong tree
Fall short of
Fall in line
Shake like a leaf
Turn over a new leaf
Leaf through (something)
Fall off the map
Fall to pieces
Fall by the wayside
Fail to finish an activity; to stop trying
to quickly look through papers or books
In a difficult situation
To become emotionally upset
To gain something without making any effort
To follow the wrong course or make a wrong choice
Shakes a lot with nerves or fright
To stop being known or considered; disappear
To start behaving in a better way
Behave in a manner that is similar to others
To not be noticed or dealt with
Fall deeply and suddenly in love with someone
To not reach a particular level or standard
The person you are talking to doesn't listen to your request
