Read the theory, then read sentences 1-4 and say which words

Read the theory, then read sentences 1-4 and say which words you dont expect to be stressed. Listen and check, then listen again and repeat.
Weak forms
We put emphasis on the words that are the most important for a message to be understood (usually nouns, main verbs, adjectives . These words are the stressed forms, while the ones that are less important are weak forms that are not stressed (usually articles, prepositions, auxiliary verbs, pronouns amp; conjunctions . Compare the examples: We had a picnic in the park, (with stressed words) We had a picnic in the park, (with no stressed words
Can you understand the message as easily when there are no stressed words? gt;
1 The sea was so rough that day that many boats got into trouble.
2 When the man set out to climb the mountain, he had no idea that the weather would change so fast.
3 It was Jane who left last.
4 There is a man lying in the road unconscious.