SN4 ""

No	Pattern	Freq
1	[noun] which has to be	85
2	[noun sg] which has to be	79
3	[pron] which has to be	9
4	[indef pn] which has to be	7
5	[prep] which has to be	5
6	[prep] which has to be	5
7	which [adv] has to be	15
8	which [adv] has to be	15
9	which [noun] has to be	8
10	which [pron] has to be	7
11	which [noun sg] has to be	7
12	which then has to be	6
13	which then has to be	6
14	which has [verb] to be	30
15	which has [vb pp] to be	30
16	which has [adv] to be	15
17	which has [adv] to be	15
18	which has come to be	13
19	which has come to be	13
20	which has yet to be	10
21	which has proved to be	10
22	which has yet to be	10
23	which has prove to be	10
24	which has to be [verb]	127
25	which has to be [vb pp]	127
26	which has to be [adv]	11
27	which has to be [adv]	10
28	which has to be [adj]	10
29	which has to be [adj]	8
30	which has to be take	6