The plural form of system is systems.
The plural form for the noun system is systems; the plural possessive form is systems'.
The plural form of system is systems.
"Indices" is the plural form of the word "index," which refers to a list or system used to access information. "Index" is the singular form.
The possessive form of the plural noun spies is spies'.Example: All of the spies' names have been entered into the system.
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 "I" is "we."
The plural form of "was" is "were."
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
"Groceries" is the plural form of "grocery."