adj & verbs with prepositions - pronunciation

In speech, prepositions are usually unstressed. They would be unstressed, for example, in "I'd like to apply for a loan", or "I'm so proud of you".

They can be stressed when a contrast is being made, or there is some other reason for emphasis: "I told you to put the food in the freezer" (not, say, on top of it); "Finished my bath? I'm not even in it yet!"; "Stop talking o

Adjectives and verbs are considered 'content words' so they are usually stressed. Prepositions are considered 'function or structure words' so they are usually unstressed.
Of course, as explained by the author above, this all depends on the context.

Here is a link to a sentence stress lesson

Here's a gift for you. <-- FOR is not stressed, and so it'll be replaced by a weak form, which will sound like FUR.
What are you waiting for? <-- Exception: this FOR is nor stressed completely, but you could say it has a secondary stress, and so it's not reduced. This happens when you have prepositions or words that might take the weak form at the end of a statement. Another example like

I had a homiletic teacher say that prepositions should never be stressed when speaking; however there is an exception e.g., in Lincoln's Gettysburg Address, he says "government of the people, by the people, for the people" and many speakers stress the prepostions, while the operative words are " people." Figure it out, which of the parts of speech her are the important words, the prepositions (of