To determine the stressed syllables in each sentence, you need to understand the concept of stress in English pronunciation. In English, stress refers to the emphasis placed on certain syllables in a word. Stressed syllables are generally pronounced with more force, loudness, and duration compared to unstressed syllables.
Here's how you can identify the stressed syllables in each sentence:
a) I know why he wanted to see you.
To identify the stressed syllables, you can say the sentence slowly, putting extra emphasis on different syllables and observing which ones sound more impactful. By doing this, you can determine that the stressed syllables are:
I KNOW why he WANTed to see you.
b) What's the time?
Again, say the sentence slowly and emphasize different syllables to identify the stressed ones. For this sentence, it will be:
What's the TIME?
c) Don't forget to turn out the light!
Apply the same approach to this sentence:
Don't forGET to TURN out the LIGHT!
d) It's another beautiful day today.
Once again, say the sentence slowly, emphasizing different syllables:
It's anOTHer BEAUtiful DAY toDAY.
Remember that stressed syllables tend to have a longer duration, higher pitch, and greater intensity compared to unstressed syllables.
While it can sometimes be challenging to identify the stressed syllables in certain words or sentences without context, the key is to practice and develop an ear for the patterns of stress in English pronunciation.