Many detailed studies have been made of what Justin knew of the Sayings of Jesus but there have been fewer works discussing his understanding of the narrative of Jesus and the Church up till his own time. Since so many of the Sayings of Jesus fit well enough with the Sayings found in the Canonical gospels, and since there appear to be also a few narrative overlaps, it is widely held as a given that Justin knew of the canonical gospels.
I have doubts about this assumption, and I have expressed a few of my reasons on a new upload on my website. (I have not, however, discussed there some of the shortcomings of the studies of the Saying of Jesus in Justin — that is a future work.)
So now I have just added the next table. It was originally completed some years ago but hey, I need time to get some of these things out there.
Related post: Justin Martyr and the 2nd century gospel story
Justin+Martyr, JustinMartyr, Christian+origins