SN4 ""

No	Pattern	Freq
1	[conj] it is [conj]	147
2	[subord] [pers pn] is [conj]	124
3	[conj] [pers pn] is [coord]	101
4	[conj] [pers pn] is [subord]	70
5	[coord] [pers pn] is [conj]	53
6	[conj] [pers pn] is and	51
7	[conj] [pers pn] is and	51
8	as [pers pn] is [conj]	45
9	as [pers pn] is [conj]	45
10	[conj] [pers pn] is because	36
11	[conj] [pers pn] is because	36
12	[conj] [pers pn] is that	30
13	[conj] [pers pn] is [that]	30
14	[conj] [pers pn] is that	30
15	[conj] he is [conj]	29
16	[conj] [pers pn] is but	28
17	and [pers pn] is [conj]	28
18	and [pers pn] is [conj]	28
19	[conj] [pers pn] is but	28
20	that [pers pn] is [conj]	24
21	that [pers pn] is [conj]	24
22	[that] [pers pn] is [conj]	24
23	[conj] [pers pn] is or	20
24	[conj] [pers pn] is or	20
25	whether [pers pn] is [conj]	19
26	but [pers pn] is [conj]	19
27	whether [pers pn] is [conj]	19
28	but [pers pn] is [conj]	19
29	[conj] she is [conj]	16
30	where [pers pn] is [conj]	15