SN4 ""

No	Pattern	Freq
1	[pers pn] know perfectly well	121
2	[pron] know perfectly well	121
3	you know perfectly well	52
4	you know perfectly well	52
5	[noun] know perfectly well	24
6	she know perfectly well	21
7	she know perfectly well	21
8	i know perfectly well	20
9	i know perfectly well	20
10	he know perfectly well	15
11	he know perfectly well	15
12	[noun prp] know perfectly well	11
13	they know perfectly well	9
14	they know perfectly well	8
15	[noun sg] know perfectly well	6
16	[vb mod] know perfectly well	6
17	[noun pl] know perfectly well	6
18	[modal v] know perfectly well	6
19	[conj] know perfectly well	5
20	know [det] perfectly well	11
21	know [adj] perfectly well	11
22	know that perfectly well	7
23	know that perfectly well	7
24	know perfectly well [conj]	78
25	know perfectly well [that]	75
26	know perfectly well that	75
27	know perfectly well that	75
28	know perfectly well [pron]	57
29	know perfectly well [Wh det]	26
30	know perfectly well what	26