▁mean ▁a ▁change ▁in ▁the ▁situation , ▁a ▁change ▁in ▁the ▁weather ▁etc . ▁An ▁example ▁sentence ▁would ▁be ▁. ▁This ▁sentence ▁means ▁' When ▁we ▁were ▁sleep ing , ▁it ▁started ▁to ▁rain '. ▁Notice ▁ ▁is ▁used ▁because ▁something ▁changed , ▁in ▁this ▁case ▁the ▁weather . ▁Another ▁instance ▁in ▁which ▁ ▁can ▁be ▁used ▁is ▁to ▁indicate ▁an ▁event ▁that ▁will ▁happen ▁in ▁the ▁future . ▁For ▁example , ▁if ▁someone ▁said , ▁"," ▁( mean ing ▁' What ▁are ▁we ▁going ▁to ▁do ? ') ▁ ▁is ▁used ▁to ▁imply ▁a ▁change ▁to ▁the ▁current ▁situation . ▁In ▁these ▁examples ▁so ▁far ▁ ▁was ▁used ▁to ▁mark ▁a ▁change ▁but ▁ ▁can ▁also ▁be ▁used ▁for ▁a ▁comparison ▁such ▁as ▁, ▁which ▁transl ates ▁to ▁' M au i ▁is ▁t aller ▁than ▁T ah ali '. ▁In ▁all ▁of ▁these ▁sentences ▁the ▁particle ▁is ▁actually ▁placed ▁in ▁many ▁different ▁places ▁in ▁the ▁sentence . ▁For ▁example , ▁in ▁the ▁first ▁sentence ▁the ▁particle ▁was ▁placed ▁before ▁the ▁object , ▁while ▁in ▁the ▁second ▁sentence ▁it ▁was ▁placed ▁before ▁the ▁subject . ▁As ▁it ▁turns ▁out ▁the ▁pla cement ▁of ▁this ▁particle ▁var ies ▁and ▁there ▁do ▁not ▁appear ▁to ▁be ▁any ▁specific ▁rules ▁as ▁to ▁where ▁to ▁exactly ▁put ▁ ▁in ▁a ▁sentence . ▁All ▁that ' s ▁known ▁is ▁that ▁it ▁can ▁sometimes ▁go ▁at ▁the ▁very ▁beginning ▁of ▁a ▁sentence ▁before ▁everything ▁else , ▁just ▁before ▁the ▁subject , ▁or ▁after ▁the ▁subject ▁but ▁before ▁the