SN4 ""

No	Pattern	Freq
1	[adv] have to do [adj]	72
2	[not/n't] have to do [adj]	58
3	not have to do [adj]	58
4	n't have to do [adj]	56
5	[modal v] have to do [adj]	53
6	[vb mod] have to do [adj]	53
7	will have to do [adj]	31
8	[pers pn] have to do [adj]	21
9	[pron] have to do [adj]	21
10	'll have to do [adj]	21
11	[adv] have to do [adj]	14
12	you have to do [adj]	10
13	will have to do [adj]	10
14	you have to do [adj]	9
15	would have to do [adj]	8
16	may have to do [adj]	5
17	would have to do [adj]	5
18	may have to do [adj]	5
19	might have to do [adj]	5
20	might have to do [adj]	5
21	have [noun] to do [adj]	10
22	have [verb] to do [adj]	9
23	have [noun sg] to do [adj]	8
24	have [vb pp] to do [adj]	7
25	have time to do [adj]	7
26	have time to do [adj]	7
27	have to do [art] [adj]	28
28	have to do [art] [adj]	28
29	have to do [pron] [adj]	22
30	have to do [prep] [adj]	17