Answer :
Let's look at the sentences one by one to figure out the correct words to fill in the blanks.
I ____ find my keys yesterday.
- The context here is past tense, indicating something that happened in the past. The appropriate choice is 'couldn't,' because it means you were not able to do something. Therefore, the correct sentence is: "I couldn't find my keys yesterday."
When I was 5, I ____ ride a bike.
- This sentence talks about something in the past when you were 5 years old. 'Couldn't' is appropriate here as it suggests an inability to ride a bike at that time. So, the correct sentence is: "When I was 5, I couldn't ride a bike."
You ____ try the soup, it's delicious.
- Here, the sentence is offering a suggestion or recommendation. 'Should' is the best choice as it advises someone to try the soup because it's tasty. Thus, the correct sentence is: "You should try the soup, it's delicious."
These sentences use modal verbs to express ability, permission, or obligation in different contexts, which is an important aspect of English grammar.
