16.疑问词19个
what(什么)
when(什么时候)
why(为什么)
what color(什么颜色)
what time(几点)
what day(星期几)
how old(年龄多大,几岁)
how(怎样)
how many(多少)
how much (多少钱)
howtall (多高)
howheavy(多重)
how long(多长)
how big(多大)
how large(面积多大)
where(在哪里)
which(哪一个)
who(谁)
whose (谁的)
17.be动词5个
am
is
are
was
were
18.助动词3个
do
does
did
19.情态动词4个
can
should
would
will