SN4 ""

No	Pattern	Freq
1	[conj] it is sometimes [verb]	47
2	[subord] it is sometimes [verb]	40
3	as it is sometimes [verb]	24
4	as it is sometimes [verb]	24
5	[noun] it is sometimes [verb]	11
6	[adv] it is sometimes [verb]	9
7	[adv] it is sometimes [verb]	9
8	[noun sg] it is sometimes [verb]	9
9	although it is sometimes [verb]	6
10	although it is sometimes [verb]	6
11	though it is sometimes [verb]	5
12	which it is sometimes [verb]	5
13	[pron] it is sometimes [verb]	5
14	[Wh det] it is sometimes [verb]	5
15	which it is sometimes [verb]	5
16	though it is sometimes [verb]	5
17	[coord] it is sometimes [verb]	5
18	it is sometimes [adj] [verb]	100
19	it is sometimes [adj] [verb]	89
20	it is sometimes difficult [verb]	22
21	it is sometimes difficult [verb]	22
22	it is sometimes possible [verb]	19
23	it is sometimes possible [verb]	19
24	it is sometimes useful [verb]	14
25	it is sometimes useful [verb]	14
26	it is sometimes [adj -er] [verb]	9
27	it is sometimes necessary [verb]	8
28	it is sometimes necessary [verb]	8
29	it is sometimes [adv] [verb]	7
30	it is sometimes [adv] [verb]	7