In Phrasal verbs^x, Past perfect^x, Clauses^x

"Grammar and exercises are only requirements of the syllabus, not of learning a language. Did you learn the grammar of your mother-tongue when you were acquiring it? Most of you may still not know the grammar of your mother-tongue but you speak it effortlessly." If grammar means identifying...

Ant_222 wrote:«You have been on missions where you have had to jump out of a helicopter into icy water to perform the rescue.» Is this sentence ok¿ Shouldn't the second «have had» be changed to «had»?This is optional, but only when: --- Tense simplification in subordinate...