SN4 ""

No	Pattern	Freq
1	[verb] [adv] [adv] when	524
2	[adv] [adv] [adv] when	154
3	be [adv] [adv] when	151
4	[be] [adv] [adv] when	151
5	[noun] [adv] [adv] when	134
6	[vb past] [adv] [adv] when	124
7	[conj] [adv] [adv] when	115
8	[adv] [adv] [adv] when	105
9	[coord] [adv] [adv] when	99
10	[pron] [adv] [adv] when	96
11	[vb pp] [adv] [adv] when	93
12	[noun sg] [adv] [adv] when	89
13	[pers pn] [adv] [adv] when	86
14	[was/were] [adv] [adv] when	81
15	[vb infin] [adv] [adv] when	78
16	and [adv] [adv] when	70
17	and [adv] [adv] when	70
18	[to-vb] [adv] [adv] when	67
19	[vb base] [adv] [adv] when	64
20	was [adv] [adv] when	61
21	[vb -s] [adv] [adv] when	51
22	[v-ing] [adv] [adv] when	47
23	[is] [adv] [adv] when	44
24	[adv prt] [adv] [adv] when	38
25	[noun pl] [adv] [adv] when	34
26	come [adv] [adv] when	32
27	it [adv] [adv] when	31
28	is [adv] [adv] when	31
29	it [adv] [adv] when	31
30	go [adv] [adv] when	30