SN4 ""

No	Pattern	Freq
1	be [adj] to account for	66
2	is [adj] to account for	27
3	be [adj] to account for	21
4	be able to account for	13
5	be able to account for	13
6	was [adj] to account for	11
7	be insufficient to account for	11
8	be insufficient to account for	11
9	be difficult to account for	10
10	are [adj] to account for	10
11	be difficult to account for	10
12	be unable to account for	9
13	be unable to account for	9
14	be sufficient to account for	7
15	be sufficient to account for	7
16	be [det] to account for	6
17	be enough to account for	5
18	be enough to account for	5