SN4 ""

No	Pattern	Freq
1	[conj] it [modal v] [be] and	14
2	[subord] it [modal v] [be] and	11
3	[pron] it [modal v] [be] and	10
4	[Wh det] it [modal v] [be] and	10
5	as it [modal v] [be] and	8
6	as it [modal v] [be] and	8
7	what it [modal v] [be] and	7
8	what it [modal v] [be] and	7
9	[verb] it [modal v] [be] and	6
10	[adv] it [modal v] [be] and	5
11	it [modal v] [adv] [be] and	7
12	it [modal v] [prep] [be] and	5
13	it [modal v] to [be] and	5
14	it [modal v] [prep] [be] and	5
15	it [modal v] to [be] and	5
16	it [modal v] [be] [adj] and	250
17	it [modal v] [be] [adj] and	227
18	it [modal v] [be] [verb] and	150
19	it [modal v] [be] [vb pp] and	144
20	it [modal v] [be] [noun] and	35
21	it [modal v] [be] [adv] and	19
22	it [modal v] [be] [adj -er] and	17
23	it [modal v] [be] [noun sg] and	13
24	it [modal v] [be] [adv] and	12
25	it [modal v] [be] [noun prp] and	11
26	it [modal v] [be] done and	9
27	it [modal v] [be] do and	9
28	it [modal v] [be] [noun pl] and	8
29	it [modal v] [be] [adv prt] and	7
30	it [modal v] [be] [pron] and	6