Strongly emphasizing a single word in a speech has a tendency to suggest its antithesis. Notice how the meaning changes by merely putting the emphasis on different words in the following sentence. The parenthetical expressions would really not be needed to supplement the emphatic words.
_I_ intended to buy a house this Spring (even if you did not).
I _INTENDED_ to buy a house this Spring (but something prevented).
I intended to _BUY_ a house this Spring (instead of renting as heretofore).
I intended to buy a _HOUSE_ this Spring (and not an automobile).
I intended to buy a house _THIS_ Spring (instead of next Spring).
I intended to buy a house this _SPRING_ (instead of in the Autumn).
