"Bloc-notes" is singular. The plural would be "blocs-notes".
Singular - eauPlural - eaux
Tu as is singular is French. The plural French form is Vous êtes.
Hors d'oeuvres is the English plural, hors d'oeuvre is the English singular. Hors d'œuvre is the French plural and the French singular.
The plural form of rendezvous is rendezvous, with the "s" pronounced (it is silent in the singular). In the French language from which the word originates, the plural form is the same as the singular. In the globalized pidgin "English" of the Internet, you are free to innovate.
It is plural and French.
"went" in French is "allé" for masculine singular, "allée" for feminine singular, "allés" for masculine plural, and "allées" for feminine plural.
Cinéma is the singular form of a masculine noun in French. The plural form is cinémas and may be translated as "films," "movie theaters" or "movies" in English. The pronunciation will be the same for the singular and the plural forms in French: "see-ney-ma."
singular: un manteau, plural: des manteaux
"Your" formal: singular = votre plural = vos "Your" informal: masculine singular = ton feminine singular = ta plural = tes
A cat is "un chat", masculine noun and singular if there is only one. Use the plural "des chats" when there are several of them.
the word emphasis is already singular because when in foreign plural it is emphases
The English plural form of "adieu" is "adieux." The foreign plural forms can vary by language, for example in French it would be "adieux," in Spanish it would be "adiós," and in Italian it would be "addii."