SN4 ""

No	Pattern	Freq
1	[conj] it [is] sometimes [verb]	48
2	[subord] it [is] sometimes [verb]	41
3	as it [is] sometimes [verb]	24
4	as it [is] sometimes [verb]	24
5	[noun] it [is] sometimes [verb]	13
6	[noun sg] it [is] sometimes [verb]	11
7	[adv] it [is] sometimes [verb]	10
8	[adv] it [is] sometimes [verb]	10
9	although it [is] sometimes [verb]	6
10	although it [is] sometimes [verb]	6
11	though it [is] sometimes [verb]	5
12	[pron] it [is] sometimes [verb]	5
13	[coord] it [is] sometimes [verb]	5
14	which it [is] sometimes [verb]	5
15	though it [is] sometimes [verb]	5
16	which it [is] sometimes [verb]	5
17	[Wh det] it [is] sometimes [verb]	5
18	it [is] [adj] sometimes [verb]	6
19	it [is] [adj] sometimes [verb]	6
20	it [is] sometimes [adj] [verb]	113
21	it [is] sometimes [adj] [verb]	100
22	it [is] sometimes difficult [verb]	24
23	it [is] sometimes difficult [verb]	24
24	it [is] sometimes possible [verb]	21
25	it [is] sometimes possible [verb]	21
26	it [is] sometimes useful [verb]	14
27	it [is] sometimes useful [verb]	14
28	it [is] sometimes necessary [verb]	10
29	it [is] sometimes [adj -er] [verb]	10
30	it [is] sometimes hard [verb]	10