Here's the answer:
“мы могли бы отдохнуть сегодня”
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Russian with Memrise get this phrase correct 90.55% of the time!
Fun fact: the hundreds of thousands of people learning Russian with Memrise get this phrase correct 90.55% of the time!