1、many、a
great/good
many 、a
great/large
number
of 、scores
of、dozens
of和 (quite)
a
few, 这类“许多”修饰作主语的名词时，只能修饰名词复数形式，谓语动词用复数。
There
are
a
great/good
many
English
books
in
our
school
library.
2、the
number
of
+
n （可数名词复数） 表示"....的数目”,用它做主语时，谓语用单数
The
number
of
the
students
in
our
class
is
55.
3、既可以修饰可数名词复数， 又可以修饰不可数名词a
lot
of 、lots
of 、plenty
of 、supplies
of ，a
great/quantity
of 、great/large
quantities
of。
He
has
got
a
lot/lots
of
questions
to
ask.
4、只能修饰不可数名词的“许多” 有：much、a
great
/
good
deal
of 和a
large
amount
of ，这类“许多”修饰主语名词时候， 谓语用单数。
I
don't
know
they
gave
us
much
help.
5、a
great
deal 做名词词组和副词词组，也表示“大量，许多”，还可以修饰比较级，表示程度。
At
the
end
of
the
year
there
was
a
great
deal
to
do.年底有很多事情做。
6、many
a
/an
+ 单数可数名词也表示许多，这个短语作主语时谓语用单数。
Many
a
girl
in
our
class
has
learned
to
swim.
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