SN4 ""

No	Pattern	Freq
1	[verb] [adv] [adv] prevent	39
2	[be] [adv] [adv] prevent	17
3	be [adv] [adv] prevent	17
4	[modal v] [adv] [adv] prevent	13
5	[vb mod] [adv] [adv] prevent	13
6	[vb pp] [adv] [adv] prevent	11
7	[noun] [adv] [adv] prevent	11
8	do [adv] [adv] prevent	9
9	[was/were] [adv] [adv] prevent	9
10	[vb -s] [adv] [adv] prevent	8
11	was [adv] [adv] prevent	7
12	have [adv] [adv] prevent	7
13	[vb past] [adv] [adv] prevent	6
14	will [adv] [adv] prevent	6
15	is [adv] [adv] prevent	6
16	will [adv] [adv] prevent	6
17	[noun sg] [adv] [adv] prevent	6
18	[vb base] [adv] [adv] prevent	6
19	[is] [adv] [adv] prevent	6
20	[conj] [adv] [adv] prevent	5
21	[coord] [adv] [adv] prevent	5
22	can [adv] [adv] prevent	5
23	[adv] [adj] [adv] prevent	9
24	[adv] [adj] [adv] prevent	9
25	[adv] [conj] [adv] prevent	9
26	[adv] [coord] [adv] prevent	8
27	[adv] and [adv] prevent	7
28	[adv] and [adv] prevent	7
29	[adv] [adv] [adj] prevent	14
30	[adv] [adv] [adj] prevent	12