Grammar fix
a crucial role
play/have a crucial role (in something)
to be an extremely important or decisive part of a situation, process, or outcome; to have a major influence on what happens.
Hear it in context
Notice where the phrase sounds natural.
Parents play a crucial role in shaping their children's values and attitudes.
In my opinion, government support plays a crucial role in improving public health, because without sufficient funding, many essential services would not be available.
Fix the pattern
One small grammar move makes it sound right.
Not: She has a crucial role for the team's success.
Say: She plays a crucial role in the team's success.
You 'play a crucial role IN' something — not 'for'.
Which sounds natural?
Tap the one a native speaker would say.
'Play a crucial role' is the natural collocation; 'fulfil an indispensable function' is bureaucratic.
Build natural chunks
Words that usually travel with it.
play a crucial role + in
- a crucial role
- a key role
- in the process
- a vital role