SN4 ""

No	Pattern	Freq
1	is [adv] [verb] and	1172
2	is [adv] [vb pp] and	1023
3	is well [verb] and	113
4	is [adv] [v-ing] and	90
5	is then [verb] and	63
6	is now [verb] and	49
7	is both [verb] and	42
8	is also [verb] and	33
9	is [adv] [to-vb] and	33
10	is fully [verb] and	30
11	is still [verb] and	28
12	is [adv] know and	26
13	is easily [verb] and	26
14	is [adv] known and	26
15	is [adv] [vb base] and	25
16	is often [verb] and	25
17	is already [verb] and	24
18	is always [verb] and	23
19	is highly [verb] and	22
20	is [adv] establish and	20
21	is [adv] established and	20
22	is [adv] write and	18
23	is [adv] use and	17
24	is [adv] used and	17
25	is [adv] written and	17
26	is constantly [verb] and	16
27	is widely [verb] and	15
28	is properly [verb] and	14
29	is [adv] understood and	14
30	is [adv] understand and	14