Чтобы не ошибиться в определении частиц, надо...

А Выделить в предложении служебные слова.
Б Найти среди них слова, которые не относятся к союзам и предлогам.
В Попробовать опустить частицу в предложении, не нарушив его структуру.​

Вопрос 2
 a -
- - 
the the
a the
the the 
the
7. - - 
8.an the
9.the
10/the

вопрос 3
1.salesmen's money
2.my girlfriend's birthday
3.my parents' telephone number
4.the students' hostel
5.the women's hats

вопрос 4
 .1.c
2.c
3.a
4.b
5.a

вопрос 5 
1.is
2. were..was
3.will be
4.is isn't is will be
5.is  is
6.am was
7.was  is
8.is  are not  are
9.will be will be
10.were  was

вопрос 6 

1.there are
2.there will be
3.there was
4.there is
5.are there  no there aren't 
6.there were
7.ia there..  there is
8.were there.. there was
9.are there  there are
10/there was..

Вопрос 2
 a -
- - 
the the
a the
the the 
the
7. - - 
8.an the
9.the
10/the

вопрос 3
1.salesmen's money
2.my girlfriend's birthday
3.my parents' telephone number
4.the students' hostel
5.the women's hats

вопрос 4
 .1.c
2.c
3.a
4.b
5.a

вопрос 5 
1.is
2. were..was
3.will be
4.is isn't is will be
5.is  is
6.am was
7.was  is
8.is  are not  are
9.will be will be
10.were  was

вопрос 6 

1.there are
2.there will be
3.there was
4.there is
5.are there  no there aren't 
6.there were
7.ia there..  there is
8.were there.. there was
9.are there  there are
10/there was..