SN4 ""

No	Pattern	Freq
1	[noun] [conj] [adv] required	22
2	[noun sg] [conj] [adv] required	14
3	[verb] [conj] [adv] required	11
4	[vb pp] [conj] [adv] required	9
5	require [conj] [adv] required	7
6	required [conj] [adv] required	7
7	[conj] [conj] [adv] required	6
8	[noun pl] [conj] [adv] required	6
9	[adj] [conj] [adv] required	5
10	[conj] be [adv] required	34
11	[conj] [be] [adv] required	34
12	[conj] is [adv] required	13
13	[conj] [is] [adv] required	13
14	[conj] [noun] [adv] required	12
15	[conj] [was/were] [adv] required	11
16	[conj] [noun sg] [adv] required	10
17	[conj] are [adv] required	9
18	[conj] [am/are] [adv] required	9
19	[conj] was [adv] required	7
20	[conj] [subord] [adv] required	6
21	[conj] [conj] [adv] required	6
22	[conj] if [adv] required	5
23	[conj] if [adv] required	5
24	[conj] [adv] be required	16
25	[conj] [adv] [be] required	16
26	[conj] [adv] [is] required	12
27	[conj] [adv] is required	12
28	[conj] [adv] [conj] required	10
29	[conj] [adv] [subord] required	9
30	[conj] [adv] required [prep]	28