Starter challenge (Connotations)

1. Happy, delighted.
I am happy to see you. (Can replace with delighted)
I'm happy to take you if you need a lift. (Can't replace with delighted)

2. Look, examine.
I looked at the fish. (Can replace with examined)
I looked up at the plane flying by. (Can't replace)

3. Sad, mournful
I was sad. (Can replace with mournful)
I felt sad looking at the man who killed himself. (Can't replace with mournful)

4. Walking, strolling
I was walking in the park. (Can be replaced with strolling)
I brought at ice-cream whilst I was walking my dog. (Can't be replace with strolling)