SN4 ""

No	Pattern	Freq
1	[verb] they know	258
2	let they know	133
3	[vb base] they know	122
4	do they know	115
5	let they know	59
6	[vb past] they know	58
7	did they know	58
8	do they know	57
9	[to-vb] they know	40
10	to let they know	39
11	[modal v] they know	20
12	[vb mod] they know	20
13	[vb infin] they know	18
14	let they know	17
15	letting they know	12
16	[v-ing] they know	12
17	not they know	10
18	[not/n't] they know	10
19	[adv] they know	10
20	n't they know	10
21	will they know	7
22	will they know	7
23	feel they know	7
24	feel they know	5
25	[vb -s] they know	5
26	they [vb mod] know	268
27	they [modal v] know	268
28	they will know	102
29	they would know	63
30	they 'll know	60