If we missed some rakaats of some prayer behind an imaan, after completion of prayer, how we will start the prayer?
Answer:
Fiqh-us-Sunnah :Volume 2, Page 54a: Catching up with imam or the congregation Whoever joins a congregation, he should perform the opening takbir while standing and then move directly to the act that the congregation may be performing, for instance, if the congregation is prostrating one should perform the opening takbir and then join it in the prostration. However, such a person is not considered as having performed the rak'ah unless he performs the ruku' (bowing), even if he just bows and puts his hands on his knees, when the imam is finishing his ruku'.Abu Hurairah reports that the Messenger of Allah sallallahu alehi wasallam said: "If you come to the salah and we are in sajdah, then make sajdah with us but do not count it [as a rak'ah]. And whoever 'catches' the ruku', he catches the salah."
This is related by Abu Dawud, Ibn Khuzaimah in his Sahih, and by al-Hakim, who considers it sahih, in his Al-Mustadrak.
Thus in the light of above guidance of prophet mohammad (pbuh), when ever one joins congregation prayer in progress, one should stand & declare opening ‘takbir’, & then immediately & directly move to the act in which the congregation is. I,e if the congregation is in ‘sajda’ then he should also goto to ‘sajda’.
Narrated Abu Huraira: Allah's Apostle said, "Whoever could get one Rak'a of a prayer, (in its proper time) he has got the prayer." SAHIH AL-BUKHARI[Volume 1, Book 10, Number 554]
When the imam finishes the prayer by saying taslim (salam) on both sides then you should get up to complete the missed raka’s. but remember one thing that you should sit for “atayyatu” after every two rakas, to complete the prayer.
