in football a cntre half would be 'un milieu de terrain' in French.
One half in French would be demi.
"une demi-soeur"
et demi
we say: centre commercial
"mi-trimestre"
"mi-trimestre"
un demi
Demi-journées
demi-frère
Sports is spelt as sports or sportif, and center is spelt as centre, there is one correction though, in English we say "sports center" but in french it has to be "centre sportif) In other words Sports Center = Centre Sportif
le centre ville
In French, you would say "Il est quatre heures et demie."