Grammar fix
fill out
complete a form
to write information in all the spaces on a form or document.
phrasal verbB1common
Hear it in context
Notice where the phrase sounds natural.
- You need to fill out this form before you see the doctor.daily life
- In my country, when you apply for a new passport, you have to fill out several forms with your personal information.IELTS speaking
Fix the pattern
Pattern: fill out + noun (form, application, document, etc.)
WrongPlease fill the form and sign it.
RightPlease fill out the form and sign it.
Need 'out' (AmE) or 'in' (BrE); bare 'fill' means make full.
Patternfill out + noun (form, application, document, etc.)
Use it right
Choose the version that sounds natural in speech.
'Complete the requisite documentation' is bureaucratic; 'fill out / fill in the form' is natural.
Build natural chunks
Words that usually travel with it.
fill out + documentthe forman applicationthe paperworka questionnaire
Don't confuse it
'Fill up' means to make something full (like a glass with water), not to complete a form.