Titles is the plural of title
The plural form of the abbreviation Mr. is Messrs. (from the French title messieurs). The plural form of Mr. Lyon is Messrs. Lyon.The plural possessive form is Messrs. Lyon's.Example: You need both Messrs. Lyon's approvals for that expense.
The plural and possessive of the abbreviation works better if the acronym is used: MD (no periods) or the title spelled out: Medical Doctor.The plural for of the acronym MD is MDs.The plural possessive form is MDs'.The plural form of the compound noun Medical Doctor is Medical Doctors.The plural possessive form is Medical Doctors'.
Misses
The plural form is fathers-in-law, because you're talking about more than one person. The rest of the compound, -in-law, remains singular because they share a title.
# Mses. This form follows the pattern of the plural form for the courtesy title Miss, which is Misses. # Mss has also been suggested. However, as mss is also an abbreviation for manuscripts it is unlikely to be found in, or come into, common usage.
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."
The plural form of the title 'Mr.' is Messrs. When addressing two males by title, the title is plural not the name.Example: The two Messrs. Smith are cousins.However, addressing people in this manner is quite formal, it's not normally used in everyday conversation. In general conversation we might say, "The Smiths are cousins."The abbreviation Messrs. is derived from use of the French title messieurs of the 18th century. Messieurs is the plural of monsieur.