Regarding your two sentences, the first one should be appear because dogs is plural. So appear agrees with the plural wording there. Appears is true for the second sentence, because dog is singular.
What is difference between appear and appears?
As verbs the difference between appears and appear
is that appears is (appear) while appear is (label) to come or be in sight; to be in view; to become visible.
How do you use appear in a sentence?
Appear sentence example
- You always appear when something bad is about to happen. ...
- They didn't appear to be moving quickly. ...
- He tried unsuccessfully to appear wounded. ...
- "It doesn't appear to be broken," he concluded in a monotone, "But we should take you to a doctor, just to be sure."