To do is translated "faire" in French. As a verb, it hasn't a plural but forms that you can use in the plural. Follow the link to find these conjugations.
The plural of "agréable" in French is "agréables."
The plural of "bonjour" in French is "bonjours."
A sister is "une soeur" in French. The plural is "des soeurs".
The plural of "objet" in French is "objets."
The plural of "woman" in French is "femmes."
If you mean "miss" as in "madame", the plural is "mesdames".
The plural of "princess" in French is "princesses."
les is the plural for both articles 'la' and 'le' in French
The plural form of "glace" in French is "glaces."
The plural of "the school" in French is "les écoles."
The French plural form of timid is timides.
The plural of egg in French is "œufs."