1. My sister is more hard-working than me.
>I don’t work as hard as my sister .
2. Do you have a better refrigerator than this?
> Is this the best refrigerator you have?
3. Finding an apartment in a big city is not easy.
> It is not easy to find an apartment in a big city.
4. February often has 28 days.
> There are often 28 days in February.