SN4 ""

No	Pattern	Freq
1	[noun] [modal v] be when	59
2	[pron] [modal v] be when	51
3	[pers pn] [modal v] be when	47
4	[noun sg] [modal v] be when	42
5	it [modal v] be when	26
6	it [modal v] be when	26
7	[noun pl] [modal v] be when	15
8	[adj] [modal v] be when	12
9	[det] [modal v] be when	12
10	that [modal v] be when	8
11	that [modal v] be when	8
12	you [modal v] be when	6
13	you [modal v] be when	6
14	he [modal v] be when	5
15	he [modal v] be when	5
16	[modal v] [adv] be when	18
17	[modal v] [verb] be when	13
18	[modal v] [pron] be when	12
19	[modal v] have be when	12
20	[modal v] [vb infin] be when	12
21	[modal v] [adv] be when	11
22	[modal v] have be when	11
23	[modal v] [pers pn] be when	10
24	[modal v] [prep] be when	7
25	[modal v] [prep] be when	7
26	[modal v] n't be when	7
27	[modal v] not be when	7
28	[modal v] [not/n't] be when	7
29	[modal v] only be when	6
30	[modal v] to be when	6