An example might be the one below:
Comment linguistically on 3 features of child language in the following extract.
Parent: Did you have a nice day at nursery?
Child: It was good. Some childrens from big school came and play guitars for us.
Parent: That sounds fun.
Child: My hurted my knee at nursery.
Parent: How did you do that?
Child: My falled over.
Parent: Where did you hurt it?
Child: On my knee, I telled you dat.
Parent: But where were you. Inside or outside?
Child: At nursery. I was riding bike.
So, for one feature you might say "The child has used overgeneralised past tense endings on the verbs hurted, telled and falled". And that would get you 2 marks out of the 5 you need.
What else could you pick out and label to get you the full 5 marks?