प्रत्ययान्तानि भूतकालवाचक धातुसाधित विशेषनाणि क्त आणि क्तवतु प्रत्यय ।
in english language we use particiles in different tenses likewise pratyay used in sanskrit language.क्त प्रत्यय is very important in sanskrit language.
so students concentrate on this topic and study well.you get success no doubt.