Adverbial phrase: Determining parts of speech

[kbhardwaj]

Could you please help me figure out the parts of speech in the following sentence?

I had breakfast yesterday morning.

(Source: I framed it myself while studying parts of speech.)

I'm particularly confused with "yesterday" and "morning".

--
Kb

[tim]

"yesterday morning" is a specific point in time and therefore is used as a two-word adverb, describing when you had breakfast..