I thank both Grammar Geek and Yankee for the excellent replies.
It seems Marius is not on line today. I hope he will read this thread today too.
So I should be able to draw a line between impossible events and hypothetical events.
4] If researchers produce a powerful drug to kill the AIDS virus, millions of AIDS patient will benefit.
5] If researchers produce a powerful drug to kill the AIDS virus, millions of AIDS patient would benefit.
It is my understanding that the possibility of synthesizing a new drug is always exist.
In your opinion, which is the correct one. The fourth or fifth.
It shouln't be a drug for AIDS. It may be a drug for curing diabetes, arthritiis, etc.
As far as I understand there is no drug to cure diabetes,arthritis etc. People who suffer from such disorders have to go on taking drugs to keep the problem at bay.