As far as I can see, your questions have been answered so far (see all your discussions here). Don't give up! There's nothing wrong with your style - you will be answered.
I really wonder the differences between drug & medicine and also dinner & supper.please notice and inform me.Nobody answers me so I began to feel unhappy.Is there something wrong with me or my style ?
Supper is usually eaten later than dinner and often is not such a prepared meal, more of a snack.
Drug is used more when we are talking about the chemicals or when we are talking about the product, while medicine is used more when we're talking about what the doctor gives us to take. Drug is also used for illegal substances like cocaine.
thanks for your interest.
You're welcome, and welcome.
Well, here in the US, we use the meal terms slightly differently than our overseas counterparts (and even differently in the various regions here). For example: in the NorthEast, the noontime meal is lunch, and dinner is the 3rd (usually last) meal of the day. It is the one where the family usually eats together as a unit (provided that one or more parents don't have a second job after their first one, and provided that the children aren't involved in sports after school). It also takes the most preparation time. Supper is interchangeable here. However, in the South, dinner is the noon meal and supper is the evening meal. I'm not sure about the West coast, SouthWest or Mid-West areas.
The term "medicine" is always used in regards to legal medicines, either over-the-counter (OTC) preparations which do not require a prescription (like Tylenol, Motrin, cough medicines, etc.) or prescription medications requiring a doctor's signature. The term "drug" can be used amongst friends & acquaintances colloquially to mean legal medicine, but is more often used to refer to illegal street drugs like pot, crack, heroin, etc. So, it looks as though we have the same usage here.
In some areas of Britain, they say 'dinner' for the meal consumed in the middle of the day. I've read that this usage is because the word refers to the main meal rather than the time. For the evening meal in these regions, some refer to it as 'tea', so it's a bit of a nightmare area for the poor learners. If they do the north and south of both countries, they'll end up utterly confused.