"The dress is getting torn"
linapasuKa - the '(i/e)k' is for STATIV mood.
Passive mood with a 'w' infixed at the end assumes a 'doer' , an author of the action. 'the dress is getting torn by someone'
the stativ mood states the result (being torn) or the general condition (easy to be torn) without any author
another example would be:
kuvunja - to break
Msichana a-me-vunja kikombe. - The girl has broken the cup.
Kikombe ki-me-vunj-ik-a. - The cup has been broken/breakable
Kikombe ki-me-vunj-w-a. - The cup has been broken by somebody.
you CAN'T say:
Vikombe vi-li-vunj-ika ni-li-po-vi-angusha. - The cups were broken when I dropped them.You have to use Passive in this case since there is an author of action (not being the subject which are the cups) mentioned in the second half of the sentence. So it has to be:
Vikombe vi-li-vunj-w-a ni-li-po-vi-angusha.
*po = when
Hope I got this right. I am not a native.