SN4 ""

No	Pattern	Freq
1	be their [noun sg]	1528
2	is their [noun]	592
3	was their [noun]	505
4	be their [noun pl]	295
5	be their [noun]	216
6	's their [noun]	206
7	are their [noun]	142
8	were their [noun]	89
9	been their [noun]	64
10	be their duty	32
11	be their duty	32
12	be their home	29
13	be their job	29
14	be their job	28
15	be their home	28
16	be their ability	27
17	be their ability	27
18	be their responsibility	26
19	be their responsibility	26
20	be their problem	25
21	be their problem	25
22	be their name	22
23	be their fault	21
24	be their fault	21
25	be their way	21
26	be their way	21
27	being their [noun]	19
28	be their [n mass]	19
29	be their right	18
30	be their view	18