Necessity and Obligation
You use this modal verb to express strong obligation, like a rule or law.
Must
This adjective ending describes how someone feels.
-ed
This modal verb expresses present ability.
Can
According to Josh Kaufman, this is the number of hours needed to learn a new skill well enough to use it.
20 hours
This is how you say hello in Spanish.
Hola
This phrase means something is necessary, but not as strong as “must.”
Have to
This adjective ending describes the thing that causes the feeling.
-ing
This modal verb expresses past ability.
Could
Malcolm Gladwell says it takes this many hours to become world-class at something.
10,000 hours
This is how you say hello in Japanese.
Konnichiwa
This phrase means something is forbidden.
Must not
The correct adjective to describe your feeling after watching a scary movie.
Frightened
This phrase is used to talk about future ability.
Will be able to
This is the name of the book that says you can learn anything in 20 hours.
The First 20 Hours
This is how you say hello in Italian.
Buongiorno
This phrase means something is not necessary.
Don’t have to
The correct adjective to describe the movie that made you feel scared.
Frightening
This modal verb expresses possibility or permission.
Can
This is the name of the book that introduced the 10,000-hour rule.
Outliers
This is how you say hello in Arabic.
As-salamu alaykum
You use this modal to give advice, not obligation.
Should
Choose the correct adjective: “The class was ___, so the students were ___.”
boring / bored
This phrase means someone succeeded in doing something difficult.
Was able to
This word means “the ability to do something well.”
Skill
This is how you say hello in Thai.
Sawasdee