SN4 ""

No	Pattern	Freq
1	is [conj] the [noun] be	636
2	is [that] the [noun] [be]	532
3	is that the [noun] [be]	531
4	is that the [noun] [be]	531
5	is [conj] the [noun sg] [be]	470
6	is [conj] the [noun] [is]	400
7	is [conj] the [noun] is	395
8	is [conj] the [noun pl] [be]	138
9	is [conj] the [noun] [am/are]	134
10	is [conj] the [noun] are	126
11	is [conj] the [noun] [was/were]	99
12	is [subord] the [noun] [be]	97
13	is [conj] the [noun] was	73
14	is because the [noun] [be]	45
15	is because the [noun] [be]	45
16	is whether the [noun] [be]	39
17	is whether the [noun] [be]	39
18	is [conj] the [noun] were	26
19	is [conj] the [noun prp] [be]	20
20	is [conj] the [n mass] [be]	8
21	is if the [noun] [be]	8
22	is [conj] the [noun] be	8
23	is if the [noun] [be]	8
24	is [coord] the [noun] [be]	7
25	is [conj] the government [be]	7
26	is [conj] the government [be]	7
27	is [conj] the system [be]	6
28	is [conj] the system [be]	6
29	is [conj] the question [be]	5
30	is [conj] the company [be]	5