Grammar fix
pitch in
join in helping
To join other people in helping with a shared job, usually by giving your time, effort or a bit of money.
phrasal verbB1common
Hear it in context
Notice where the phrase sounds natural.
If everyone pitches in, we'll have the hall cleared in no time.
A: There's a lot to set up before the fair.
B: Don't worry, we'll all pitch in.
Fix the pattern
One small grammar move makes it sound right.
Not: Everyone pitched in the cleaning.
Say: Everyone pitched in to help with the cleaning.
Use 'pitch in to [verb]' or 'pitch in with [noun]'; don't put the task straight after 'pitch in'.