SN4 ""

No	Pattern	Freq
1	[conj] [adv] required	46
2	[subord] [adv] required	41
3	[conj] so required	21
4	[conj] so required	21
5	if [adv] required	18
6	if [adv] required	18
7	[coord] [adv] required	18
8	[conj] [not/n't] required	17
9	[conj] not required	17
10	[conj] not required	17
11	when [adv] required	11
12	when [adv] required	11
13	and [adv] required	8
14	or [adv] required	8
15	or [adv] required	8
16	and [adv] required	8
17	[conj] alternatively required	6
18	[conj] alternatively required	6
19	as [adv] required	6
20	as [adv] required	6