Modal Verbs

1. Should+base verb

1.1. _If were you I should listen to my parents

2. (Do+not/Does+not+have to) (Not important)

2.1. _She doesn't have to pay for valet.Its free for customers

3. Lack of necessity

4. Ability/lack of ability

4.1. Can (not) +base verb

4.1.1. Ability (power)

4.1.1.1. _He can speak three different languages

4.1.2. Lack of ability

4.1.2.1. _We cannot travel without our passports

5. Advice

5.1. Should (not) +base verb

5.1.1. _You should not wear tight shoes they will hurt your freet

6. Obligation

6.1. 1) Interal Obligation (Important)(must)

6.1.1. _ I must get 95 in Tawjihi

6.2. 2) External Obligation (have to)

6.2.1. _ We have to wear mask and gloves every time we go to the mall

7. Permission/lack of permission

7.1. Can (not) + base verb

7.1.1. Permission (allowed to)

7.1.1.1. _You can use the elevator, I will give you many pin code

7.1.2. Lack of permission (not allowed to)

7.1.2.1. _You cannot enter, Staff only

8. Prohibition

8.1. (must+ not+ base verb) ( forbidden by the law)

8.1.1. _ You must not use your mobile phone on plane while lading