SN4 ""

No	Pattern	Freq
1	[adj] it [be] for	154
2	[adj] it be for	154
3	[adj] it [be] for	125
4	[adj] it [is] for	105
5	[adj] it is for	99
6	[adj] it was for	49
7	[adj] it [was/were] for	49
8	difficult it [be] for	31
9	difficult it [be] for	31
10	important it [be] for	25
11	important it [be] for	25
12	[adj -er] it [be] for	18
13	hard it [be] for	15
14	easy it [be] for	14
15	hard it [be] for	10
16	easy it [be] for	9
17	necessary it [be] for	7
18	[num] it [be] for	7
19	necessary it [be] for	7
20	[adj] it 's for	6
21	good it [be] for	6
22	harder it [be] for	5
23	easier it [be] for	5
24	better it [be] for	5