Get ready to talk to a doctor in English with this doctor patient conversation. A doctor tells a patient not to take some sleeping tablets until they go to bed, but the patient takes them anyway. Notice how the doctor gives the instruction in English and also how they use the word effective. What does effective mean?
Here are some strong sleeping tablets, but don’t take them until you go to bed.
They’re very effective.
Hmmm. They can’t be that effective.