SN4 ""

No	Pattern	Freq
1	[not/n't] [vb infin] [pron] had	373
2	[not/n't] [verb] [pers pn] had	319
3	n't [verb] [pron] had	295
4	[not/n't] know [pron] had	133
5	[not/n't] know [pron] had	127
6	not [verb] [pron] had	116
7	[not/n't] think [pron] had	112
8	[not/n't] think [pron] had	110
9	[not/n't] [verb] he had	78
10	[not/n't] [verb] he had	78
11	[not/n't] [verb] what had	64
12	[not/n't] [verb] what had	64
13	[not/n't] [verb] [Wh det] had	64
14	[not/n't] [verb] you had	55
15	[not/n't] [verb] you had	55
16	[not/n't] [verb] i had	53
17	[not/n't] [verb] i had	53
18	[not/n't] [verb] she had	49
19	[not/n't] [verb] she had	47
20	[not/n't] [verb] they had	37
21	[not/n't] [verb] they had	35
22	[not/n't] [verb] we had	28
23	[not/n't] [verb] we had	28
24	[not/n't] believe [pron] had	27
25	[not/n't] believe [pron] had	26
26	[not/n't] [vb pp] [pron] had	23
27	[not/n't] realise [pron] had	22
28	[not/n't] [verb] it had	18
29	[not/n't] [verb] it had	18
30	[not/n't] say [pron] had	17