Let me tell you an interesting thing that happened to me today.One of my friends showed me an english book called:English on Trip and asked?Whats your idea about it?Do you think its a good book?I said I've not seen it before.let me take a look at that.after reading afew of the first pages I told her it seems to be a good book then I went to see some pages in the middle of the book that suddenly I saw on the page133 these words:some glasses I said these words are wrong . the correct words are:some pairs of wearing glasses,We need ;apair of before some special words such as wearing glasses(eynak)Shoes,scissors(gheychy)Pijamas,pants so for example you say such sentences as:
I should go to an eye doctor i need a pair of wearing glasses
cut it wit a pair of scissors
I want to buy two pairs of pants.My friend laughed and said maybe they have written in short form I also laughed and answered :How short!we can say ok lets omit(hazf)wearing but what about the nessasery part which is a pair of!!