It means "when the weather is fine, I play tennis".
Quand il... in French means "When he..." in English.
Quand la musique est bonne in French means "When the music is good" in English.
Je dormirai quand j'aurai terminé in French means "I'll sleep when I am finished" in English.
when did you get married?
when I'll see you
"Who and what and where and when and why" translates to "Qui et quoi et où et quand et pourquoi" in French.
when there is sun, when it's sunny
"When did he die?" is an English equivalent of the French phrase Quand est-il mort? The question translates literally as "When is he dead?" in English. The pronunciation will be "kaw-tey-teel mor" in French.
"When do you study?" is a literal English equivalent of the French phrase Quand étudies-tu? The pronunciation of the interrogative in the second person informal singular of the present indicative -- which also translates as "When are you studying?" -- will be "kaw ey-tyoo-dee-tyoo" in French.
"When's your birthday (anniversary)?" is an English equivalent of the French phrase C'est quand ton anniversaire? The question translates literally as "It's when, your anniversary (birthday)?" in English. The pronunciation will be "sey kaw to-na-nee-ver-ser" in French.
Quand est-ce que Ma Mère l'Oie arrive au bistro? in French is "When does Mother Goose get to the bar?" in English.
"What do you do when it's warm?" is an English equivalent of the French phrase Que fais-tu quand il fait chaud? The question also translates as "What do you make when the weather is warm?" in English. The pronunciation will be "kuh feh-tyoo kaw-teel feh sho" in French.