I know that "tense" indicates time. If that is true, then not every sentence can be indicated of its tense. Please review these sentences: "If I could go to the market , I must have taken breakfast ...
The sentence is not referring to any time past, present of future. It's just referring to an imaginary condition which has never existed and seemingly will never exist. Still, the sentence and other ...
All the textbooks I have ever come across during the course of my studying English emphasize that future tense should not be used in conditional clauses. For example, If it rains in the evening, ...