Lesson three Oral topic: in the chemical laboratory Grammar

Imperative mood


The sentences that give a command or make a request are called imperative sentences.
Stop it. Stop talking.
Be yourself. Trust your own intuition.
Listen. Pack your suitcases we are going to leave.


Occasionally, to give emphasis, we include the subject (always the addressee):
You take my advice, Jane.
Exercise 14. Ask your partner:

• 
  to apply for the job;
  
• 
  to imitate the teacher’s (the speaker’s) pronunciation.
  
• 
  to comment on the fact;
  
• 
  to establish a new point of reference;
  
• 
  to choose a better description;
  
• 
  to accept the invitation.
  

Study negative imperative sentences:
Don’t take the job, if you are not sure.
Don’t imitate others, be yourself.
Exercise 15. Ask your partner.

• 
  not to smoke (that much);
  
• 
  not to speak so loud;
  
• 
  not to give advice if you are not asked for;
  
• 
  not to accept that job;
  
• 
  not to trust that person;
  
• 
  not to give comments.
  

Exercise 16. Learn some of the informal uses of imperatives.
Think nothing of it (acknowledging apology).
Do it my way. (advice).
(Do) forgive me. (apologizing).
Excuse me. (apologizing, starting to speak to a stranger).
Please do. (giving permission).
Look here. (attention-getting).
Tell me another. (disbelief).
Look out! / Watch out! (warning).
Take care (saying farewell).
Check out! (focusing).
Imperative Mood in instructions and regulations.


Exercise 17. Read:

1. 
   General Lab Safety Rules and say if you always follow them.
   

1. 
   Work in the lab when the teacher is present.
   
2. 
   Walk! Do not run in the lab.
   
3. 
   Do not eat, drink beverages, or chew gum in the lab.
   
4. 
   Never taste chemicals
   
5. 
   Avoid contact with chemicals. Wear safety glasses whenever necessary.
   
6. 
   Clean and dry your lab table.
   
7. 
   Never rely on the shape, size or color of the bottle. Read the label.
   
8. 
   Always wash hands after experiments.
   
9. 
   Report any accident (spill, breakage, etc.) or injury (cut, burn, etc.) to the instructor immediately.
   
10. 
    Carefully follow all instructions.
    

2. 
   the following instructions and translate them into Russian