SN4 ""

No	Pattern	Freq
1	[noun] and when they	119
2	[noun sg] and when they	76
3	[conj] and when they	71
4	[subord] and when they	70
5	as and when they	42
6	as and when they	42
7	[noun pl] and when they	35
8	[verb] and when they	26
9	[adv] and when they	26
10	if and when they	22
11	if and when they	22
12	[adj] and when they	13
13	[adv prt] and when they	10
14	[adv] and when they	9
15	[vb pp] and when they	8
16	[pron] and when they	8
17	[noun prp] and when they	8
18	[adj] and when they	8
19	[Wh adv] and when they	7
20	[vb base] and when they	7
21	[pers pn] and when they	6
22	and [adv] when they	82
23	and [noun] when they	79
24	and [adv] when they	78
25	and [verb] when they	52
26	and then when they	35
27	and then when they	35
28	and [noun sg] when they	31
29	and [noun pl] when they	31
30	and [adj] when they	23