" u " means "that" , indicates something/somebody which is far from speaker. eg, u bir alma~~that is an apple. ' bu ' means " this " , indicate something/somebody which is far from speaker.eg, bu bir alma.~~this is an apple

"xu" is the another kinds of "u", also means "that", but it is widely than "u"~~it could indicates sth/sb/sometime/somewhere. E.g, xu kitap~~that book. (object) xu kixi~~that man. (person ) xu yili~~ that year (or) xu yili de~~ at that year. (time) xu xeher~~ that city ( or) xu xeher de~~ at that city. (place)

u bu shu mawu uly

U ni kopinche adamlarga ishlitimiz, He,She. Bu ni This dep ishletsek bolidu. Xu(shu) ni The digen bilan bazan yarlirida oxshaydu we melum bir narsini korsitishke ishlitidu, mesilen: Shu qelem, Shu kitab. digendek. Mavu ni That bilen oxshiship kitidu.

"avu" (it/that)is same meaning with "mavu" , but it is usually used to describe an object or person which is far from speaker. E.g, mavu Yalqun, avu Ayim, men Elham, ~~ this is Yalqun, that is Ayim, I am Elham.