SN4 ""

No	Pattern	Freq
1	[noun] which have helped	25
2	[noun sg] which have helped	19
3	[noun pl] which have helped	5
4	which [modal v] have helped	19
5	which [vb mod] have helped	19
6	which [pron] have helped	11
7	which would have helped	10
8	which would have helped	10
9	which [pers pn] have helped	10
10	which have [adv] helped	7
11	which have [adv] helped	6
12	which have helped [verb]	26
13	which have helped [to-vb]	21
14	which have helped [pron]	12
15	which have helped [pers pn]	12
16	which have helped [vb infin]	5