SN4 ""

No	Pattern	Freq
1	[noun] is required	1741
2	[noun sg] is required	1587
3	[pron] is required	370
4	[Wh det] is required	249
5	what is required	199
6	what is required	199
7	[adj] is required	147
8	[conj] is required	130
9	[det] is required	126
10	[pers pn] is required	107
11	[noun pl] is required	99
12	that is required	92
13	that is required	92
14	it is required	77
15	it is required	77
16	[subord] is required	58
17	[that] is required	58
18	that is required	58
19	that is required	58
20	action is required	53
21	action is required	53
22	which is required	48
23	which is required	48
24	[verb] is required	37
25	information is required	33
26	[noun prp] is required	33
27	as is required	33
28	as is required	33
29	information is required	33
30	[adv] is required	31