Complete English Grammar Rules_ Examples, Exceptions, Exercises, and Everything You Need to Master Proper Grammar ( PDFDrive )-162

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b)	are
c)	is
d)	was
	
3.	Which	auxiliary	verb	is	added	to	a	make	a	verb	negative	in	the	present	or	past
simple	tense?
a)	be
b)	will
c)	do
d)	have
	
4.	Identify	the	auxiliary	verb	used	in	the	following	sentence:
“Have	you	been	working	on	this	project	for	long?”
a)	have
b)	been
c)	working
d)	A	&	B
e)	B	&	C
f)	None	of	the	above
	
5.	Which	of	the	following	is	a	function	of	do	as	an	auxiliary	verb?
a)	To	form	negatives	with	verbs	in	the	present	or	past	simple	tense
b)	To	form	the	continuous,	perfect,	or	perfect	continuous	tenses
c)	To	express	the	subject’s	ability	to	perform	the	function	of	the	main	verb
d)	A	&	B
e)	B	&	C
f)	None	of	the	above
Modal	Auxiliary	Verbs
Definition
A	modal	auxiliary	verb,	often	simply	called	a	modal	verb	or	even	just	a
modal,	is	used	to	change	the	meaning	of	other	verbs	(commonly	known	as	main
verbs)	by	expressing	modality—that	is,	asserting	(or	denying)	possibility,
likelihood,	ability,	permission,	obligation,	or	future	intention.
Modal	verbs	are	defined	by	their	inability	to	conjugate	for	tense	and	the	third