SN4 ""

No	Pattern	Freq
1	[adv] [adj] when	3210
2	[adv] [adj] when	3001
3	[adv] [verb] when	2208
4	[adv] [adv] when	1106
5	[adv] [vb pp] when	1064
6	[adv] [adv] when	1006
7	[adv] [conj] when	859
8	[adv] that when	419
9	[adv] that when	419
10	[adv] [that] when	419
11	[adv] [vb past] when	298
12	[adv] [vb base] when	229
13	[adv] [subord] when	223
14	[adv] [coord] when	217
15	[adv] [vb infin] when	211
16	[adv] [vb -s] when	199
17	[adv] and when	169
18	[adv] and when	169
19	[adv] [v-ing] when	163
20	[adv] [adj -er] when	119
21	[adv] [adv prt] when	94
22	[adv] than when	91
23	[adv] than when	91
24	[adv] important when	87
25	[adv] important when	87
26	[adv] [noun] when	82
27	[adv] useful when	80
28	[adv] useful when	80
29	[adv] [unc] when	77
30	[adv] [no cls] when	77