Dictionary-enhanced word family
Word Forms of “Act”
To do something; to take action or behave in a particular way.
Word Family of Act
How to Use Each Word Form in a Sentence
- You must act quickly to solve this problem. A1
- He acted very strangely yesterday afternoon. A2
- The government should act decisively on climate issues. B1
Word Form Patterns for Act
-tion
Adds **-tion** to form a noun describing an action, process, or result. Example: act → action.
-ly
Adds **-ly** to make an adverb describing how an action happens. Example: act → actively.
Origin and Word Formation of Act
From Latin 'actus' — a deed or action, past participle of 'agere'.
Common Word Form Mistakes with Act
Wrong: He was act in a movie when I called.
Correct: He was acting in a movie when I called.
Present continuous requires gerund 'acting'; 'was act' is not a valid form.
Wrong: They should acts responsibly toward the environment.
Correct: They should act responsibly toward the environment.
After modal 'should', use the base verb form 'act', not 'acts'.
Frequently Asked Questions About Word Forms of Act
What are the word forms of “act”?
The confirmed forms are shown in the word family cards above. Missing parts of speech are hidden instead of filled with placeholder text.
What part of speech is “act”?
“act” is primarily a verb. Some forms above show how the same root works as other parts of speech.
Where does “act” come from?
From Latin 'actus' — a deed or action, past participle of 'agere'.