SN4 ""

No	Pattern	Freq
1	[noun] have been used [prep] [noun]	114
2	[noun pl] have been used [prep] [noun]	55
3	[noun sg] have been used [prep] [noun]	55
4	[pron] have been used [prep] [noun]	41
5	[modal v] have been used [prep] [noun]	24
6	[vb mod] have been used [prep] [noun]	24
7	which have been used [prep] [noun]	21
8	[Wh det] have been used [prep] [noun]	21
9	which have been used [prep] [noun]	21
10	[pers pn] have been used [prep] [noun]	18
11	it have been used [prep] [noun]	16
12	it have been used [prep] [noun]	16
13	[conj] have been used [prep] [noun]	13
14	[verb] have been used [prep] [noun]	9
15	[adj] have been used [prep] [noun]	8
16	could have been used [prep] [noun]	7
17	and have been used [prep] [noun]	7
18	and have been used [prep] [noun]	7
19	[coord] have been used [prep] [noun]	7
20	could have been used [prep] [noun]	7
21	may have been used [prep] [noun]	6
22	may have been used [prep] [noun]	6
23	[adv] have been used [prep] [noun]	6
24	would have been used [prep] [noun]	5
25	[that] have been used [prep] [noun]	5
26	that have been used [prep] [noun]	5
27	would have been used [prep] [noun]	5
28	that have been used [prep] [noun]	5
29	[vb pp] have been used [prep] [noun]	5
30	have [adv] been used [prep] [noun]	61