Lesson 0041


– we use have to / must  + infinitive to talk about obligation, things that are necessary to do, or to give advice about things that are a good idea to do.


  • use to say that something is obligatory. The subject of have to is obliged or forced to act by a separate, external power (for example, the Law or school rules). 

Example Sentences: 

  1. You have to speak fluent English if you want to work in the USA.
  2. Schoolchildren have to wear a uniform.
  3. In Japan, you have to drive on the left side of the road. 


  • use to say that something is essential or necessary.It expresses personal obligation or what the speaker thinks is necessary.MUST is subjective.

Example Sentences:

  1. He must work harder.
  2. You must remember to feed the dog. 
  3. You must remember to buy present for Alex. 

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