SN4 ""

No	Pattern	Freq
1	[verb] [adv] [adv] when	315
2	[adv] [adv] [adv] when	140
3	[noun] [adv] [adv] when	110
4	be [adv] [adv] when	102
5	[be] [adv] [adv] when	102
6	[adv] [adv] [adv] when	93
7	[conj] [adv] [adv] when	91
8	[coord] [adv] [adv] when	78
9	[vb past] [adv] [adv] when	77
10	[noun sg] [adv] [adv] when	72
11	[pron] [adv] [adv] when	61
12	[vb pp] [adv] [adv] when	58
13	and [adv] [adv] when	57
14	and [adv] [adv] when	57
15	[pers pn] [adv] [adv] when	54
16	[vb infin] [adv] [adv] when	53
17	[was/were] [adv] [adv] when	46
18	[vb base] [adv] [adv] when	41
19	[adv prt] [adv] [adv] when	37
20	[is] [adv] [adv] when	37
21	[to-vb] [adv] [adv] when	35
22	was [adv] [adv] when	35
23	[vb -s] [adv] [adv] when	29
24	[noun pl] [adv] [adv] when	28
25	even [adv] [adv] when	27
26	even [adv] [adv] when	27
27	is [adv] [adv] when	26
28	[adj] [adv] [adv] when	26
29	[v-ing] [adv] [adv] when	22
30	it [adv] [adv] when	21