SN4 ""

No	Pattern	Freq
1	[noun] [adv] have to be	287
2	[pron] [adv] have to be	247
3	[modal v] [adv] have to be	242
4	[vb mod] [adv] have to be	242
5	[pers pn] [adv] have to be	180
6	[noun sg] [adv] have to be	149
7	[noun pl] [adv] have to be	122
8	will [adv] have to be	107
9	[adv] [adv] have to be	102
10	would [adv] have to be	97
11	would [adv] have to be	93
12	will [adv] have to be	91
13	it [adv] have to be	76
14	it [adv] have to be	76
15	[conj] [adv] have to be	61
16	[adv] [adv] have to be	58
17	[verb] [adv] have to be	55
18	[Wh det] [adv] have to be	47
19	which [adv] have to be	45
20	which [adv] have to be	45
21	[coord] [adv] have to be	44
22	not [adv] have to be	43
23	[not/n't] [adv] have to be	43
24	and [adv] have to be	38
25	and [adv] have to be	38
26	you [adv] have to be	33
27	you [adv] have to be	33
28	[adj] [adv] have to be	30
29	not [adv] have to be	29
30	may [adv] have to be	26