Grammar Quiz: Modal Verbs of Obligation

Study Notes

Modal verbs used to express obligation or necessity:
- Must (strong obligation)
- Have to (strong obligation)
- Need to (weak obligation)
Examples:
- You must try this cake. (strong obligation)
- I have to finish this project by Friday. (strong obligation)
- You need to try this exercise to improve your flexibility. (weak obligation)
Negation:
- Must not (prohibition)
- Don't have to (no obligation)
- Don't need to (no obligation)

Expressing likes:
- I like + verb(-ing)
- I love + verb(-ing)
- I'm fond of + noun/verb(-ing)
Expressing dislikes:
- I don't like + verb(-ing)
- I hate + verb(-ing)
- I'm not fond of + noun/verb(-ing)
Intensity:
- Really like/enjoy (strong like)
- Quite like/partial to (moderate like)
- Not really like/not keen on (mild dislike)

Simple Tenses
- Present Simple: habitual actions, general truths
- Past Simple: completed actions in the past
- Future Simple: future actions
Continuous Tenses
- Present Continuous: temporary or changing situations
- Past Continuous: interrupted actions in the past
- Future Continuous: future actions in progress
Perfect Tenses
- Present Perfect: actions started in the past and continue up to the present
- Past Perfect: actions completed before another action in the past
- Future Perfect: actions completed at a specific point in the future
Perfect Continuous Tenses
- Present Perfect Continuous: actions started in the past and continue up to the present
- Past Perfect Continuous: actions started before another action in the past
- Future Perfect Continuous: actions started before a specific point in the future

Modal verbs express obligation or necessity: must, have to, and need to
Must implies strong obligation
Have to implies strong obligation
Need to implies weak obligation
Examples:
- Strong obligation: You must try this cake
- Strong obligation: I have to finish this project by Friday
- Weak obligation: You need to try this exercise to improve your flexibility
Negation:
- Prohibition: must not
- No obligation: don't have to
- No obligation: don't need to

Expressing likes:
- I like + verb(-ing)
- I love + verb(-ing)
- I'm fond of + noun/verb(-ing)
Expressing dislikes:
- I don't like + verb(-ing)
- I hate + verb(-ing)
- I'm not fond of + noun/verb(-ing)
Intensity:
- Strong like: really like/enjoy
- Moderate like: quite like/partial to
- Mild dislike: not really like/not keen on

Present Perfect Continuous: actions started in the past and continue up to the present
Past Perfect Continuous: actions started before another action in the past
Future Perfect Continuous: actions started before a specific point in the future