SN4 ""

No	Pattern	Freq
1	[noun] be [vb pp] at the time	82
2	[pron] be [vb pp] at the time	55
3	[noun sg] be [vb pp] at the time	51
4	have be [vb pp] at the time	44
5	[verb] be [vb pp] at the time	44
6	[modal v] be [vb pp] at the time	39
7	[vb mod] be [vb pp] at the time	39
8	[pers pn] be [vb pp] at the time	35
9	[noun pl] be [vb pp] at the time	27
10	[adv] be [vb pp] at the time	21
11	[vb past] be [vb pp] at the time	20
12	had be [vb pp] at the time	19
13	[Wh det] be [vb pp] at the time	19
14	[prep] be [vb pp] at the time	15
15	[prep] be [vb pp] at the time	15
16	[conj] be [vb pp] at the time	15
17	not be [vb pp] at the time	14
18	not be [vb pp] at the time	14
19	to be [vb pp] at the time	14
20	to be [vb pp] at the time	14
21	[not/n't] be [vb pp] at the time	14
22	it be [vb pp] at the time	11
23	it be [vb pp] at the time	11
24	to have be [vb pp] at the time	11
25	[to-vb] be [vb pp] at the time	11
26	which be [vb pp] at the time	11
27	which be [vb pp] at the time	11
28	must be [vb pp] at the time	10
29	can be [vb pp] at the time	10
30	can be [vb pp] at the time	10