SN4 ""

No	Pattern	Freq
1	it is [adj] [conj] the [adj]	487
2	it is [adj] [that] the [adj]	467
3	it is [adj] that the [adj]	467
4	it is [adj] that the [adj]	467
5	it is clear [conj] the [adj]	77
6	it is possible [conj] the [adj]	47
7	it is likely [conj] the [adj]	46
8	it is true [conj] the [adj]	40
9	it is important [conj] the [adj]	30
10	it is evident [conj] the [adj]	22
11	it is unlikely [conj] the [adj]	17
12	it is [adj] [subord] the [adj]	17
13	it is probable [conj] the [adj]	15
14	it is essential [conj] the [adj]	15
15	it is [adj] whether the [adj]	13
16	it is [adj] whether the [adj]	13
17	it is significant [conj] the [adj]	12
18	it is [adj] [conj] the new	12
19	it is vital [conj] the [adj]	12
20	it is [adj] [conj] the present	11
21	it is obvious [conj] the [adj]	11
22	it is arguable [conj] the [adj]	11
23	it is [adj] [conj] the labour	11
24	it is doubtful [conj] the [adj]	10
25	it is interesting [conj] the [adj]	9
26	it is [adj] [conj] the british	8
27	it is [adj] [conj] the whole	8
28	it is [adj] [conj] the main	8
29	it is [adj] [conj] the hon.	7
30	it is apparent [conj] the [adj]	7