That guy couldn't feed himself, let alone the pets.
He doesn't have enough money for food, let alone books.
The boy has no time to take care of the dogs, so he has to give it away.
A: Do you have a pet?
B: I want to keep a pet, but my wife doesn't like any pets. She is not getting a pet.
A: Why not? You can keep a cute little puppy or a kitty.
B: But my wife won't look after a dog or cat.
look after表示“照看”，“照顾”。类似的表达还有：take care of, give consideration to, care for等。
A: You can feed it, bath it and walk it everyday.
B: What if we want to go on holiday? Nobody can look after the pet. Plus, my wife thinks our house is so small that we can't feed a pet. What kind of pet do you want?
A: I want to keep a dog.
B: Dogs are regarded as the most loyal friends by human. But they are energetic, and you need to make sure they get enough exercise every day.
be regarded as...表示“被看做...”，是一个被动语态。主动语态为regard...as...
A: What about cats?
B: Cats are more independent.
A: That's great. But we're planning to have a baby in the future, so it is not suitable to get a pet in our house.