**[ [[cqp:introduction|Collection: Introduction to CQP]] ]**

===== Querying with Repetition Operators – Solutions ===== 

==== Exercise 1: Prefixation ==== 

''[hw="post-.+" & pos="AJ."]'' (3895 matches in the BNC, 118 matches in the BNC-BABY)


==== Exercise 2: Prefix- and Suffixation ==== 

''[hw="in.+ible"]'' (250 matches in the BNC-BABY)

==== Exercise 3: Matching different word forms ====

Note that these are not the only possible solutions.

1.

''[word="snowed|snowing" %c]'' (11 matches in the BNC-BABY) 

''[word="snow(ed|ing)" %c]'' (11 matches in the BNC-BABY)

2.

''[word="s[nl]ow" %c]'' (343 matches in the BNC-BABY)

''[word="snow|slow" %c]'' (343 matches in the BNC-BABY)


==== Exercise 4: Collocation ====

For longer queries with optional empty slots in between, you can run the risk of matching punctuation in the empty slot. To avoid this, ''within s'' is appended at the end of the query to specify that the match must occur **within** a sentence.  

Query for //change//:
''[hw="change"][]{,2}[class="SUBST"] within s ''  (1170 matches in the BNC-BABY)

Frequency list for //change//:

	54	mind  
	22	time  
	16	way  
	15	policy  
	15	subject  
	13	attitude  
	13	direction  
	13	hand  
	13	nappy  
	12	agent  
	12	condition

Query for //alter//:  ''[hw="alter"][]{,2}[class="SUBST"] within s'' (78 matches in the BNC-BABY)

Frequency list for //alter//:

	4	behaviour  
	3	context  
	2	child  
	2	environment  
	2	view  
	1	arrival  
	1	bath  
	1	bunny  
	1	cabinet  
	1	chain  
	1	chemistry  
	1	christening  
	1	clock  

==== More practice? ==== 

Continue here: [[cqp:practice-working-with-concordances|6c. Working with Concordances]]