SN4 ""

No	Pattern	Freq
1	[verb] in when	206
2	[vb pp] in when	56
3	[vb past] in when	46
4	[pron] in when	41
5	[noun] in when	40
6	[pers pn] in when	36
7	come in when	29
8	[vb base] in when	26
9	[noun sg] in when	26
10	[to-vb] in when	26
11	be in when	24
12	[be] in when	24
13	[vb infin] in when	23
14	[v-ing] in when	19
15	it in when	12
16	it in when	12
17	came in when	11
18	go in when	11
19	[adv] in when	11
20	[noun pl] in when	11
21	[adj] in when	10
22	[vb -s] in when	10
23	[was/were] in when	10
24	step in when	10
25	bring in when	8
26	call in when	8
27	give in when	8
28	[be] in when	8
29	set in when	8
30	called in when	8