SN4 ""

No	Pattern	Freq
1	[verb] [Wh adv] to use	204
2	know [Wh adv] to use	86
3	[prep] [Wh adv] to use	78
4	[prep] [Wh adv] to use	78
5	learn [Wh adv] to use	56
6	on [Wh adv] to use	48
7	on [Wh adv] to use	48
8	[conj] [Wh adv] to use	47
9	[coord] [Wh adv] to use	46
10	and [Wh adv] to use	43
11	and [Wh adv] to use	43
12	[vb infin] [Wh adv] to use	43
13	[vb base] [Wh adv] to use	41
14	[to-vb] [Wh adv] to use	36
15	[pron] [Wh adv] to use	35
16	[pers pn] [Wh adv] to use	34
17	[noun] [Wh adv] to use	29
18	[vb past] [Wh adv] to use	26
19	[v-ing] [Wh adv] to use	26
20	know [Wh adv] to use	24
21	know [Wh adv] to use	24
22	[adv] [Wh adv] to use	20
23	[vb -s] [Wh adv] to use	20
24	[noun pl] [Wh adv] to use	19
25	explain [Wh adv] to use	18
26	to learn [Wh adv] to use	17
27	knew [Wh adv] to use	17
28	you [Wh adv] to use	13
29	you [Wh adv] to use	13
30	[vb pp] [Wh adv] to use	12