Both sentences are grammatically correct, but they have slightly different meanings. "The dog ran quickly" refers to a specific dog that ran quickly, while "A dog ran quickly" refers to any dog that ran quickly. The use of "the" implies specificity, while the use of "a" implies generality.
Quick is an adjective. Quickly is an adverb. So you have to ask yourself what is quick? A verb or a noun? If the noun is quick, use quick. If a verb is being done quickly, then use quickly. For example: The quick dog ran. The dog is being described as quick. (dog=noun) or The dog ran quickly. The running is being done quickly. (run=verb)
Dog should have a capital D Dog ran down the street -- this is correct if 'Dog' is somebody's name or some animals name. If 'Dog' is not a name then you should have 'the' before dog. The dog ran down the street
ran lightly and quickly
No fastly is not a word. Fast is an adverb so you can say: He ran fast.
subject = dog verb = ran
It means the dog ran in the past
Quick is an adjective. Quickly is an adverb. So you have to ask yourself what is quick? A verb or a noun? If the noun is quick, use quick. If a verb is being done quickly, then use quickly. For example: The quick dog ran. The dog is being described as quick. (dog=noun) or The dog ran quickly. The running is being done quickly. (run=verb)
The correct verses will be: (1) he ran quickly and/or (2) he runs quickly.
Dog should have a capital D Dog ran down the street -- this is correct if 'Dog' is somebody's name or some animals name. If 'Dog' is not a name then you should have 'the' before dog. The dog ran down the street
The dog ran quickly through the park.
ran lightly and quickly
No fastly is not a word. Fast is an adverb so you can say: He ran fast.
I would say "returned" as it means your doing something, get it? "The dog ran quickly to claim his prize" The adverb phrase would either be, 1: Ran quickly 2: Ran 3: Quickly whatever the question is asking.
dog ran!
The phrase "ran very quickly" consists of a verb ("ran") and an adverb ("very quickly").
I'm not sure if I understand the question completely, but if you are asking for the correct part of speech for the word "same", it is normally used as an adjective. "the same thing" "the boots are the same"
"Is run" is correct. "Is ran" is not grammatically correct.