SN4 ""

No	Pattern	Freq
1	[conj] [pron] is often [adj] [to-vb]	56
2	[conj] [pers pn] is often [adj] [verb]	56
3	[conj] it is often [adj] [verb]	55
4	[conj] it is often [adj] [verb]	55
5	[conj] [pron] is often [adj] [verb]	47
6	[coord] [pron] is often [adj] [verb]	25
7	[conj] [pron] is often difficult [verb]	22
8	[conj] [pron] is often difficult [verb]	22
9	that [pron] is often [adj] [verb]	21
10	[that] [pron] is often [adj] [verb]	21
11	that [pron] is often [adj] [verb]	21
12	and [pron] is often [adj] [verb]	19
13	and [pron] is often [adj] [verb]	19
14	[subord] [pron] is often [adj] [verb]	11
15	[conj] [pron] is often [adj -er] [verb]	9
16	[conj] [pron] is often easy [verb]	8
17	[conj] [pron] is often easier [verb]	7
18	[conj] [pron] is often necessary [verb]	6
19	but [pron] is often [adj] [verb]	6
20	[conj] [pron] is often necessary [verb]	6
21	but [pron] is often [adj] [verb]	6
22	[conj] [pron] is often possible [verb]	5
23	[conj] [pron] is often possible [verb]	5