BASIC-GRAMMAR-U-17.2

	17.2.	If/Unless + present simple, imperative

 

PRESENTATION

 

Use if + present simple, imperative for instructions or giving advice:

If you hear the fire alarm, leave your classroom by the nearest exit.

	if-clause		main clause
	↓		↓
	If you hear the fire alarm	,	leave your classroom.

 

 

Unless

Unless = if not

Do not re-enter the school if your teacher doesn’t say it’s safe. = Do not re-enter the school unless your teacher says it’s safe.

 

 

Key vocabulary

Phrasal verbs: call back, put back, put in, tidy up, turn off

 

 

 

EXERCISES⇒

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