"He stopped by" is correct.
No, it is a complete sentence, but it needs punctuation (comma, semicolon) or it becomes a run-on. "You stopped, she didn't." "You stopped; she didn't."
Hitler was an admirable man because he stopped the Jews. Use that exact sentence. That's the only way it's correct. (Ha hah ha ha hah.)
The basic sentence is - Mrs Weera stopped her - this is a past simple sentence. There is only one verb - stopped - and this is in the past tense.
Ohio
Drove and Stopped are the verbs in that sentence.
She stopped her speech in mid-sentence to answer the question.
The car suddenly stopped, and just in time! I just stopped by to say hello.
The evil bad guy stopped me from saving the world
had stopped
There are 2 sentence fragments, which are: A When we stopped by the garden (what then?) Example: When we stopped by the garden, we found it was closed. D Stopping by the garden we saw (what, needs an object). Example: Stopping by the garden, we saw the vandalism done to the rose bushes. These two are correct as sentences. B Stop by the garden. (the subject You is assumed). C We stopped; she didn't. (Notice the semi-colon used to connect the two ideas.)
The conjunction AND is used first in a sentence where the sentence preceding it was truncated, or stopped, and there are details to add on the identical topic. It is usually done where putting everything in one long sentence is not possible or desirable. The second sentence should, of necessity, continue the same line of thought and not branch off further, as this can make the AND superfluous.