SN4 ""

No	Pattern	Freq
1	[adv] have to be	1076
2	[adv] have to be	1057
3	[not/n't] have to be	758
4	not have to be	758
5	n't have to be	421
6	not have to be	337
7	[adv] had to be	267
8	[adv] has to be	256
9	[adv] have to be	216
10	also have to be	156
11	also have to be	156
12	still have to be	134
13	still have to be	134
14	just have to be	80
15	just have to be	80
16	always have to be	63
17	always have to be	63
18	then have to be	63
19	then have to be	63
20	now have to be	57
21	now have to be	57
22	therefore have to be	35
23	therefore have to be	35
24	[adv] had to be	31
25	often have to be	30
26	often have to be	30
27	probably have to be	27
28	probably have to be	27
29	necessarily have to be	25
30	necessarily have to be	25