1) The past tense of 'go' is 'goed'.

2) All sentences must end with a period.

3) A pronoun is a word that takes the place of a noun.

4) The word 'quickly' is an adjective.

5) A run-on sentence is grammatically correct.

6) A preposition shows the relationship between a noun (or pronoun) and another word in a sentence.

7) Adverbs modify only verbs.

8) An adjective modifies a noun.

9) The plural form of 'child' is 'childs'.

10) Every complete sentence needs a subject (who or what the sentence is about) and a verb (the action or state of being).