SN4 ""

No	Pattern	Freq
1	[modal v] have helped	211
2	[vb mod] have helped	211
3	would have helped	70
4	would have helped	67
5	may have helped	55
6	may have helped	55
7	[adv] have helped	40
8	might have helped	33
9	might have helped	33
10	could have helped	26
11	could have helped	26
12	[not/n't] have helped	25
13	not have helped	25
14	not have helped	15
15	[adv] have helped	15
16	must have helped	13
17	must have helped	13
18	n't have helped	10
19	will have helped	8
20	will have helped	8
21	should have helped	6
22	should have helped	6
23	have [been] helped	9
24	have be helped	9
25	have been helped	9
26	have [be] helped	9
27	have helped [pron]	76
28	have helped [verb]	72
29	have helped [pers pn]	58
30	have helped [to-vb]	47