Would you please answer this question? Thank you in advance. Dear friends may you tell me if this sentence is correct or not. I'd like to have it in a formal paper. 1- In this study, (by including/including) three girls and three boys and also assuming(what is your idea about "and assuming" in this part) their numbers are enough, we showed that the previous results are right. Could you please say me which one of these sentences are right in a formal text too? 2- By (is by necessary or I better remove and write like the sentence left side of equal sign) considering electrons as particles, we presented that they can influence on our system=considering electrons as particles, we presented that they can influence on our system Which one is better "stretching" or "extending"? 3- this field is a combination of a rice-land (stretching/extending) from Tom's house to Sara's house and wheat-land (stretching/extending) from Sara's house to Thomas' house.