The plural form of the noun line is lines.
ship
The plural form of the noun gentleman is gentlemen.The plural possessive form is gentlemen's.Example: We carry a full line of gentlemen's hats.
The plural is buccaneers. The plural possessive is buccaneers'.Example: The buccaneers' ship wrecked on the reef, marooning them.
The plural form of the noun address is addresses.The plural possessive form is addresses'.Example:The student addresses' schedule is posted on-line.
The possessive form of the plural noun seniors is seniors'.Example: The seniors' schedule of activities is posted on-line.
The plural form for the compound noun day-line are day-lines. Example:Be sure to make the five thirty ferry. The day-lines shut down at six.
Those in line to inherit are the heirs apparent.
The plural form of the noun class is classes.The plural possessive form is classes'.Example: All of the classes' schedules can be found on-line.
No, one ship, two ships.
There is no plural form. Do and Do not are verbs
The word squid is usually used as singular or plural, examples: Singular: A squid was caught on my line. Plural: The restaurant had a tank of live squid on display. That being said, some people do squids as the plural form.