Common Modal Verb Errors
- They should to check the weather before they leave. ✖
- She can play the guitar after dinner. ✔
- She can swim very fast in the pool. ✔
- He can speaking three languages fluently. ✖
Common errors when using English modal verb structures
The modal auxiliary verbs below use the structure "modal verb + infinitive" (without 'to')
can, could, may, might, must, shall, should, will, would
Examples:
- When traveling, we should respect the customs of the countries we visit. (NOT should to respect; should respecting)
- You must wear a helmet when cycling to protect your head in case of an accident. (NOT must to wear; must wearing)
- Can you help me with this project? I believe your expertise would greatly benefit our team. (NOT can to help; can helping)
- In emergency situations, you might need to act quickly to ensure everyone's safety. (NOT might to need; might needing)
Modal verb questions and negatives do not use the auxiliary verb "do":
- May I join you? (NOT Do I may join you?)
- Should we start now? (NOT Do we should start now?)
- They couldn't come yesterday. (NOT They did not could come yesterday.)
When expressing obligation or necessity with "have" or "need", use "to + infinitive":
- You have to submit your report by Friday.
- She needs to decide soon.
In questions and negatives, "have to" and "need to" act as typical verbs, so we use "do":
- Do I need to make a reservation in advance? (NOT need I to make …)
- He mentioned I don't have to worry about parking. (NOT I haven't to worry …)
Test your knowledge of how to use modal verbs with this short quiz.
Which sentence is correct?
When you finish you can check your answers. Good luck!
English Modal Verbs Quiz
Modals Quiz 1