Butterflies is the plural form, and the spelling is BUTTERFLIES, not BUTTER FLYS
butters
The word butter is an uncountable noun. Thus, it doesn't have a separate plural form.
Possibly, but not necessarily. Except for a few fossil forms, such as the -s marker of the third person singular indicative and the present system of to be there is no number in the English verb.
butter flys,flys all insects that has wings
No, "butter" is an uncountable noun in the singular form according to the Oxford Advanced American Dictionary.
The plural of the fly, the insect, is flies
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "was" is "were."
The plural form of "I" is "we."