Нужно поставить слова в нужную форму.
if he noticed her, he (invite) her for a dance.
if she lost weight, she (buy) that beatiful dress.
if she (be) on holiday now, she would be relaxing on the beach. but she has to work another week.
if he (fall) in love, they would get married and live happily ever after. but these are only dreams.