H10: No Comma between Major Grammatical Elements

H10: No Comma between Major Grammatical Elements: Don’t use a comma to between major grammatical elements like subject and verb or verb and object.  See rules 1 & 2 here: http://oer2go.org/mods/en-boundless/www.boundless.com/writing/textbooks/boundless-writing-textbook/overview-of-english-grammar-punctuation-and-mechanics-251/commas-31/common-comma-mistakes-139-10368/index.html

Most of the people in the room, thought she was just playing.  (Incorrect)

Most of the people in the room thought she was just playing. (Correct)

The scientists thought, the chimpanzee understood English. (Incorrect)

The scientists thought the chimpanzee understood English. (Correct)