Plz answer this

Dear student
1. Half-yearly-
     Adverb- She pays the installment half-yearly.
     Adjective- I have my half-yearly examination tomorrow.
2. Straight-
    Adverb- The ball fell straight on his head.
    Adjective- Please draw a straight line.
3. Best-
    Adverb-  The thing I liked best was the music.
    Adjective- This is my best role till date.

For further queries please post in a separate thread.
Regards