He isn’t able to buy that luxurious car because he doesn’t have any money.
=> If he had more money, he could buy that luxurious car.

“We finished the housework 2 hours ago.” They said. (use Reported speech)  
=> They said that they had finished the housework 2 hours ago.

Jenny was the most hard-working student in the class. (use “as”)
=> No one in the class worked as hard as Jenny.

The weather was so terrible that we had to call off the picnic.
=> It was too terrible that we had to call off the picnic.

This is the first time I have eaten spaghetti.
=> I have never eaten spaghetti before.

We are all expecting her arrival at the airport with excitement. (use Phrasal verb)
=> We are all looking forward to her arrival at the airport with excitement.