SN4 ""

No	Pattern	Freq
1	[noun] and then when	53
2	[noun sg] and then when	32
3	[adv] and then when	29
4	[adv] and then when	20
5	[adj] and then when	16
6	[noun pl] and then when	15
7	[pron] and then when	14
8	[verb] and then when	13
9	[pers pn] and then when	13
10	[adv prt] and then when	9
11	[adj] and then when	8
12	it and then when	7
13	it and then when	7
14	[unc] and then when	6
15	now and then when	6
16	[det] and then when	6
17	now and then when	6
18	[no cls] and then when	6
19	and [unc] then when	8
20	and [no cls] then when	8
21	and er then when	7
22	and er then when	7
23	and then [adv] when	19
24	and then [adv] when	19
25	and then [no cls] when	11
26	and then [unc] when	11
27	and then [verb] when	9
28	and then er when	8
29	and then er when	8
30	and then only when	7