Brachos 2:2-3

Brachos 2:2

The breaks between the paragraphs are: between the two brachos; between the second bracha and Shema; between Shema and “v’haya im shamoa”; between “v’haya im shamoa” and “va’yomer”; between “va’yomer” and “emes v’yatziv.” Rabbi Yehuda says that one may not interrupt between “va’yomer” and “emes v’yatziv.” Rabbi Yehoshua ben Korcha says that the reason we recite Shema before the paragraph of “v’haya im shamoa” is so that we can first accept God’s rule over us, and then accept the mitzvos upon ourselves. The paragraph of “v’haya im shamoa” comes before that of “va’yomer” because the former applies to both day and night (since it discusses mitzvos in general) while the latter only applies by day (since it discusses tzitzis, which are not obligatory by night).

Brachos 2:3

If someone recited Shema so quietly that he could not hear himself, he nevertheless fulfills his obligation; Rabbi Yosi says that one does not fulfill his obligation in such a case. If one recites the Shema and does not clearly enunciate, he nevertheless fulfills his obligation; Rabbi Yehuda says he does not fulfill his obligation. If one recites the verses out of order, he does not fulfill his obligation. If one makes a mistake (such as by omitting a word or a verse), he must go back to the place where the error occurred and resume from there.