SN4 ""

No	Pattern	Freq
1	[vb mod] have to do [adv]	38
2	[modal v] have to do [adv]	38
3	will have to do [adv]	25
4	will have to do [adv]	13
5	'll have to do [adv]	12
6	[adv] have to do [adv]	12
7	[pers pn] have to do [adv]	10
8	[pron] have to do [adv]	10
9	would have to do [adv]	9
10	would have to do [adv]	9
11	not have to do [adv]	9
12	[not/n't] have to do [adv]	9
13	you have to do [adv]	6
14	you have to do [adv]	6
15	n't have to do [adv]	5
16	have [verb] to do [adv]	9
17	have [vb pp] to do [adv]	8
18	have to do [pron] [adv]	37
19	have to do [pers pn] [adv]	30
20	have to do it [adv]	27
21	have to do it [adv]	27
22	have to do [adv] [adv]	7
23	have to do [adv] [adv]	7
24	have to do [adj] [adv]	7
25	have to do [det] [adv]	7
26	have to do [indef pn] [adv]	7
27	have to do [adv] [prep]	12
28	have to do [adv] [prep]	12
29	have to do [adv] [conj]	11
30	have to do [adv] [subord]	11