SN4 ""

No	Pattern	Freq
1	[noun sg] is [adv] [verb] [to-vb]	937
2	[noun] is [adv] [vb pp] [to-vb]	867
3	[noun] is [adv] [v-ing] [to-vb]	351
4	[noun prp] is [adv] [verb] [to-vb]	220
5	[noun] is also [verb] [to-vb]	216
6	[noun] is now [verb] [to-vb]	139
7	[noun] is [adv] used [to-vb]	100
8	[noun] is [adv] use [to-vb]	100
9	[noun] is [adv] [verb] to have	99
10	[noun] is [adv] try [to-vb]	86
11	[noun] is [adv] expect [to-vb]	85
12	[noun] is [adv] expected [to-vb]	85
13	[noun] is [adv] trying [to-vb]	83
14	[noun] is [adv] going [to-vb]	69
15	[noun] is [adv] go [to-vb]	69
16	[noun] is still [verb] [to-vb]	67
17	[noun] is then [verb] [to-vb]	63
18	[noun] is often [verb] [to-vb]	60
19	[noun pl] is [adv] [verb] [to-vb]	52
20	[noun] is [adv] place [to-vb]	50
21	[noun] is [adv] placed [to-vb]	50
22	[noun] is [adv] required [to-vb]	43
23	[noun] is [adv] require [to-vb]	43
24	[noun] is well [verb] [to-vb]	42
25	[noun] is generally [verb] [to-vb]	33
26	[noun] is already [verb] [to-vb]	32
27	[noun] is [adv] [verb] to make	32
28	[noun] is [adv] designed [to-vb]	31
29	[noun] is [adv] beginning [to-vb]	31
30	[noun] is [adv] begin [to-vb]	31