in his backyard he built a small garden
The nouns in the sentence are tree and the compound noun backyard.
I have an awning in my backyard.
There is a black cat in the backyard.
The verb in the sentence is are, in the 3rd person plural form of the verb to be
I watched the birds in my backyard with my binoculars.
there is a wolf like coyote in the backyard.
He found genuine gold in our backyard.
You can use a hoe to dig a place for trees in your backyard.
A wren is a bird so a good sentence would be: There is a wren that built a nest in my backyard
injured
Spaceship is the subject.
I was playing in my backyard when I found a preserved tooth from a dinosaur.