SN4 ""

No	Pattern	Freq
1	[modal v] have used	182
2	[vb mod] have used	182
3	would have used	56
4	would have used	49
5	[adv] have used	48
6	could have used	40
7	could have used	40
8	may have used	25
9	may have used	25
10	[adv] have used	25
11	[not/n't] have used	23
12	not have used	22
13	must have used	20
14	must have used	20
15	should have used	16
16	should have used	16
17	might have used	15
18	might have used	15
19	not have used	14
20	will have used	10
21	will have used	10
22	n't have used	8
23	never have used	7
24	'd have used	7
25	never have used	7
26	have [been] used	190
27	have been used	190
28	have [be] used	190
29	have be used	190
30	have used [art]	59