SN4 ""

No	Pattern	Freq
1	[noun] is to ensure that the [noun]	40
2	[noun sg] is to ensure that the [noun]	31
3	[noun pl] is to ensure that the [noun]	6
4	is [adj] to ensure that the [noun]	25
5	is [adj] to ensure that the [noun]	25
6	is [verb] to ensure that the [noun]	18
7	is [vb pp] to ensure that the [noun]	17
8	is important to ensure that the [noun]	11
9	is important to ensure that the [noun]	11
10	is necessary to ensure that the [noun]	5
11	is necessary to ensure that the [noun]	5
12	is to ensure that the [noun] [noun]	16
13	is to ensure that the [noun sg] [noun]	15
14	is to ensure that the [adj] [noun]	10
15	is to ensure that the [adj] [noun]	9
16	is to ensure that the [noun] [noun]	16
17	is to ensure that the [noun] [noun sg]	12
18	is to ensure that the [noun] [verb]	10
19	is to ensure that the [noun] [prep]	7
20	is to ensure that the [noun] [prep]	7
21	is to ensure that the [noun] [vb -s]	6
22	is to ensure that the [noun] 's	5
23	is to ensure that the [noun] of	5
24	is to ensure that the [noun] ['s]	5
25	is to ensure that the [noun] [unc]	5
26	is to ensure that the [noun] 's	5
27	is to ensure that the [noun] of	5