SN4 ""

No	Pattern	Freq
1	[conj] it [was/were] for	144
2	[verb] it [was/were] for	74
3	[subord] it [was/were] for	72
4	[adj] it [was/were] for	49
5	[vb past] it [was/were] for	45
6	[adj] it [was/were] for	42
7	[adv] it [was/were] for	41
8	as it [was/were] for	39
9	as it [was/were] for	39
10	[coord] it [was/were] for	38
11	that it [was/were] for	34
12	[that] it [was/were] for	34
13	that it [was/were] for	34
14	[adv] it [was/were] for	32
15	[noun] it [was/were] for	30
16	and it [was/were] for	26
17	and it [was/were] for	26
18	say it [was/were] for	24
19	[pron] it [was/were] for	24
20	[noun sg] it [was/were] for	24
21	think it [was/were] for	22
22	said it [was/were] for	18
23	[Wh det] it [was/were] for	17
24	what it [was/were] for	15
25	what it [was/were] for	15
26	[vb base] it [was/were] for	13
27	but it [was/were] for	11
28	but it [was/were] for	11
29	think it [was/were] for	10
30	difficult it [was/were] for	9