I an best in english to teach you,i can make a good base of english for your study,i have learned english from my childhood ,now i am doing post graduate from Stirling university in bussiness ans management,i am good in english due to the reason that in all 8 semester of bsc hons in home economics i learned english for 4 years beacuase in my bachulars my all subject were in english either it is biology,biochemistry or physics,so i done my bachulars in Bsc hons home science(food and nutrition).i will tell you all preposition and grammer ,translations,sentence,phrases very well.