SN4 ""

No	Pattern	Freq
1	[conj] it [be] [vb pp] and	156
2	[subord] it [be] [vb pp] and	113
3	[adv] it [be] [vb pp] and	80
4	[Wh adv] it [be] [vb pp] and	49
5	[pron] it [be] [vb pp] and	47
6	[noun] it [be] [vb pp] and	42
7	[Wh det] it [be] [vb pp] and	41
8	[noun sg] it [be] [vb pp] and	33
9	which it [be] [vb pp] and	33
10	which it [be] [vb pp] and	33
11	how it [be] [vb pp] and	32
12	how it [be] [vb pp] and	32
13	[adv] it [be] [vb pp] and	29
14	[coord] it [be] [vb pp] and	24
15	if it [be] [vb pp] and	21
16	if it [be] [vb pp] and	21
17	that it [be] [vb pp] and	19
18	that it [be] [vb pp] and	19
19	[that] it [be] [vb pp] and	19
20	when it [be] [vb pp] and	18
21	when it [be] [vb pp] and	18
22	[verb] it [be] [vb pp] and	17
23	[prep] it [be] [vb pp] and	14
24	[prep] it [be] [vb pp] and	14
25	as it [be] [vb pp] and	14
26	as it [be] [vb pp] and	14
27	but it [be] [vb pp] and	14
28	but it [be] [vb pp] and	14
29	before it [be] [vb pp] and	12
30	before it [be] [vb pp] and	12