Task 4. Modal Verbs
- When I was a little girl, I could do acrobatic tricks, but now I can't. (Past ability)
- If there is not going to be any information about those passengers till tomorrow morning, we should call the police. (Advice/Recommendation)
- Conflicts need to lead to bad relations. (This sentence is grammatically awkward as is. If it means 'Conflicts cause bad relations', then no modal is needed. If it means 'It is necessary for conflicts to lead to bad relations', 'need to' works. A more likely interpretation is that 'Conflicts should not lead to bad relations' or 'Conflicts can lead to bad relations'. Given the options, 'need' is the most plausible if interpreted as 'conflicts necessitate leading to bad relations', though it's unusual phrasing. Let's assume it implies a necessity or a strong tendency.)
- We must have respect for other people. (Obligation/Strong necessity)
- Do you know that cats can see in the dark? (Ability)
Extra verb: May
Explanation: Modal verbs express modality like possibility, ability, permission, obligation, advice, etc. Each modal verb has specific uses and contexts.