SN4 ""

No	Pattern	Freq
1	[adv] to prevent [pron]	48
2	[adv] to prevent [pers pn]	41
3	[adv] to prevent it	17
4	[adv] to prevent it	17
5	[adv] to prevent [pos pn]	14
6	[adv] to prevent them	13
7	[adv] to prevent they	13
8	enough to prevent [pron]	7
9	enough to prevent [pron]	7
10	[adv prt] to prevent [pron]	7
11	[adv] to prevent his	5
12	[adv] to prevent his	5
13	hard to prevent [pron]	5
14	[adv] to prevent he	5
15	hard to prevent [pron]	5
16	[adv] to prevent him	5