Когда ставится are,aren’t,is,isn’t,а,an?

глагол is not (isn't) употребляется с существительными и местоимениями в единственном числе, кроме местоимений i - с "я" употребляют глагол am, а также you - "ты" или "вы" в языке считается множественным числом. с существительными и местоимениями во множественном числе пишут aren't или are not.

1. what (what exercise) is the most difficult? 2. where has my friend`s family got a flat? 3. when isn`t it cold in england? 4. what do you like to listen to? 5. what means of transport are we going on an excursion by? (how are we going on an excursion? ) 6. who likes spaghetti very much? 7. when do we start working? 8. where does jane meet her friends? 9. whom (who) doesn't she want to dance with? 10. why is jack upset?   1. are you doing now? 2. does your father go on mondays? 3. didn't you come to school yesterday? 4. do you think of mike? 5. many people live here? 6. are they from? 7. are you thinking about? 8. is the nearest telephone? 9. don't you like this sweater? 10. do they get to school? 11.   time do you get back? 12.   often does he go running?     1. the museum is on your left. 2. we've got lost. could you tell us how we can get to the sadovyi pereulok (side street)? - sure. go towards the underground station. when you see the entrance, go downstairs and go through the underpass. there is a square opposite the exit, and the pereulok (side street) is right across it. 3. go along the street! 4. the hospital is a modern building. it is situated between the bank and library. 5. the bus stop is over there, around the corner. it is far from here.