SN4 ""

No	Pattern	Freq
1	[be] it then that	8
2	be it then that	8
3	it be then that	230
4	it [be] then that	230
5	it [was/were] then that	202
6	it was then that	201
7	it [is] then that	28
8	it is then that	24
9	it [verb] then that	18
10	it [vb -s] then that	14
11	it seem then that	9
12	it seems then that	7
13	it follow then that	6
14	it follows then that	5
15	it then [verb] that	23
16	it then [vb -s] that	19
17	it then requests that	10
18	it then request that	10
19	it then follow that	5
20	it then follows that	5
21	it then transpire that	5
22	it then that [pers pn]	7
23	it then that [pron]	7