In the first Gemara of Brachos, the gemara quotes a 'seifa' that says:
THE MORNING SHEMA IS PRECEDED BY TWO BRACHOS AND FOLLOWED BY ONE. THE EVENING SHEMA IS PRECEDED BY TWO BRACHOS AND FOLLOWED BY TWO"
What brachos are referred to in this quote?
This is a Mishnah in Berachos (Perek 1:4)
The Brachos are as follows:
The first Bracha starts with "Baruch ata...asher bidvaro maariv aravim..." and ends with "Baruch ata...hamaariv aravim"
The second Bracha starts with "Ahavas olam.." and ends with "Baruch ata...ohev amo yisrael" followed directly by shema.
The first after Bracha starts with "emes ve'emuna" and ends with "Baruch ata...ga'al yisrael"
The Second after Bracha starts with "Hashkivenu..." and ends with "Baruch ata...Shomer es amo Yisroel La'ad" (I believe there is a difference here depending on your nusach.)
Note: The reason the second Bracha in both the Morning shema (before) and the evening shema (before and after) do not start with "Baruch ata..." is because they are "Brachos hasmuchos l'chaverta" since the previous Brachos ended with "Baruch ata..." these do not start with "Baruch ata"
The same applies for Brachot that start right after the Shema. (they don't start with "Baruch ata..." but they are still considered their own Bracha)