SN4 ""

No	Pattern	Freq
1	have [adv] [vb pp] how	271
2	have [adv] [vb pp] how	183
3	have [adv] [vb pp] how	100
4	had [adv] [vb pp] how	99
5	have [not/n't] [vb pp] how	88
6	have not [vb pp] how	88
7	have already [vb pp] how	62
8	have already [vb pp] how	62
9	have n't [vb pp] how	44
10	have not [vb pp] how	44
11	have [adv] seen how	41
12	has [adv] [vb pp] how	35
13	've [adv] [vb pp] how	26
14	have [adv] realised how	24
15	have [adv] known how	21
16	have never [vb pp] how	18
17	have never [vb pp] how	18
18	have [adv] forgotten how	17
19	have [adv] realized how	16
20	have [adv] learned how	14
21	have [adv] said how	13
22	have also [vb pp] how	13
23	have also [vb pp] how	13
24	have just [vb pp] how	12
25	have just [vb pp] how	12
26	have always [vb pp] how	11
27	have often [vb pp] how	11
28	have always [vb pp] how	11
29	have often [vb pp] how	11
30	have [adv] explained how	10