例句"it must belong to jane "belong为什么不用加S

Taiwan it belongs to china.belong为什么加s these hammers belong to jim.语法对吗.这个主语是三单belong不用加S吗. Carla it to must belong 连词 for my star.just belong to me.belong后面为什么不加S? it is belongs to me belong后面为什么要加s It might belong to Sb.这里的belong为什么没有因为三单加s? 急must belong to 1.It must belong to Bob,s [反义疑问句】 2,It must be right [反义疑问句】 I love must belong to Must belong to相当于什么? belong to my must love where am I belong to?用不用加to?