SN4 ""

No	Pattern	Freq
1	it be [adj] [prep] this [noun]	134
2	it be [adv] [prep] this [noun]	129
3	it be [adj] [prep] this [noun]	128
4	it be [adv] [prep] this [noun]	100
5	it be [verb] [prep] this [noun]	83
6	it be [vb pp] [prep] this [noun]	69
7	it be only [prep] this [noun]	25
8	it be only [prep] this [noun]	25
9	it be also [prep] this [noun]	22
10	it be also [prep] this [noun]	22
11	it be not [prep] this [noun]	18
12	it be [not/n't] [prep] this [noun]	18
13	it be [noun] [prep] this [noun]	17
14	it be important [prep] this [noun]	15
15	it be not [prep] this [noun]	15
16	it be important [prep] this [noun]	15
17	it be clear [prep] this [noun]	14
18	it be clear [prep] this [noun]	14
19	it be [adv prt] [prep] this [noun]	11
20	it be probably [prep] this [noun]	10
21	it be [noun sg] [prep] this [noun]	10
22	it be [conj] [prep] this [noun]	10
23	it be appropriate [prep] this [noun]	10
24	it be appropriate [prep] this [noun]	10
25	it be probably [prep] this [noun]	10
26	it be precisely [prep] this [noun]	9
27	it be because [prep] this [noun]	9
28	it be because [prep] this [noun]	9
29	it be [v-ing] [prep] this [noun]	9
30	it be [subord] [prep] this [noun]	9