SN4 ""

No	Pattern	Freq
1	be often [adj] [to-vb]	457
2	be often [adj] [to-vb]	420
3	is often [adj] [to-vb]	268
4	be often difficult [to-vb]	129
5	be often difficult [to-vb]	129
6	are often [adj] [to-vb]	109
7	be often possible [to-vb]	42
8	be often possible [to-vb]	42
9	was often [adj] [to-vb]	35
10	be often [adj -er] [to-vb]	31
11	be often able [to-vb]	28
12	be often able [to-vb]	28
13	be often necessary [to-vb]	26
14	be often necessary [to-vb]	26
15	were often [adj] [to-vb]	25
16	be often hard [to-vb]	23
17	be often hard [to-vb]	23
18	be often easy [to-vb]	22
19	be often reluctant [to-vb]	18
20	be often reluctant [to-vb]	18
21	be often easier [to-vb]	17
22	's often [adj] [to-vb]	16
23	be often impossible [to-vb]	13
24	be often impossible [to-vb]	13
25	be often [adj] to make	11
26	be often [adj] to use	11
27	be often [adj] to find	11
28	be often good [to-vb]	11
29	be often [adj] to tell	11
30	be often willing [to-vb]	9