SN4 ""

No	Pattern	Freq
1	it [be] clear	2642
2	it be clear	2642
3	it [is] clear	1905
4	it is clear	1773
5	it [was/were] clear	733
6	it was clear	732
7	it [verb] clear	606
8	it become clear	395
9	it [vb past] clear	359
10	it [adv] clear	331
11	it became clear	317
12	it [adv] clear	312
13	it [vb -s] clear	238
14	it seem clear	173
15	it seems clear	148
16	it 's clear	132
17	it quite clear	112
18	it quite clear	112
19	it becomes clear	74
20	it absolutely clear	51
21	it absolutely clear	51
22	it very clear	49
23	it very clear	49
24	it abundantly clear	27
25	it abundantly clear	27
26	it seemed clear	25
27	it perfectly clear	25
28	it perfectly clear	25
29	it not clear	19
30	it [not/n't] clear	19