Grammar fix

stand up for

defend someone or something

to support or defend a person, idea, or right, especially when it is being criticized or challenged

phrasal verbB1common

Hear it in context

Notice where the phrase sounds natural.

You should always stand up for your friends if someone is treating them unfairly.relationships
In my opinion, it's important to stand up for your beliefs, even if others disagree with you.IELTS speaking

Pattern: stand up for + noun/pronoun

WrongYou should stand up your friends.

RightYou should stand up for your friends.

Don't drop 'for'. Without it, 'stand up' just means rise to your feet.

Patternstand up for + noun/pronoun

Choose the version that sounds natural in speech.

Stiff You must defend the rights of those unable to protect themselves.

Natural You've got to stand up for people who can't defend themselves.

'Stand up for' is the spirited everyday phrase; 'defend the rights of' is formal.

Words that usually travel with it.

'Stand for' can mean 'represent' or 'tolerate', but 'stand up for' means to actively defend or support.