Concession

CONCESSIVE CLAUSES   http://writesite.elearn.usyd.edu.au/m2/m2u4/m2u4s4/m2u4s4_4_8.htm

Look at this sentence 

Much as he had always believed in her fiancee ´ s  love, he was now in doubt whether she really was actually  in lov e with him or it was just an infatuation 

Hard though he tried , he had little hope of suceeding 

Here the contrast is sharp, robust, no doubts that the situation is  contrary to expectations .

Please red the link above

Your teachers   .