SN4 ""

No	Pattern	Freq
1	have had [to-vb]	2102
2	[vb base] had [to-vb]	860
3	have had [to-vb]	573
4	[vb -s] had [to-vb]	492
5	[vb past] had [to-vb]	391
6	has had [to-vb]	389
7	[vb infin] had [to-vb]	334
8	have had [to-vb]	332
9	had had [to-vb]	300
10	've had [to-vb]	286
11	's had [to-vb]	103
12	'd had [to-vb]	91
13	[verb] had to go	88
14	[verb] had to take	63
15	[verb] had to have	63
16	[verb] had to pay	60
17	[verb] had to make	60
18	[verb] had to do	54
19	[verb] had to wait	48
20	[verb] had to put	46
21	[verb] had to work	42
22	[verb] had to get	32
23	[verb] had to face	31
24	[verb] had to give	31
25	[verb] had to learn	30
26	[verb] had to endure	27
27	[verb] had to deal	26
28	[verb] had to come	26
29	[verb] had to leave	24
30	having had [to-vb]	23