SN4 ""

No	Pattern	Freq
1	when they [vb past]	4456
2	when they [vb base]	3700
3	when they have	950
4	when they come	465
5	when they had	422
6	when they do	395
7	when they get	392
8	when they have	288
9	when they go	280
10	when they came	250
11	when they reach	249
12	when they do	244
13	when they see	218
14	when they arrive	218
15	when they come	213
16	when they reached	205
17	when they got	200
18	when they get	191
19	when they arrived	166
20	when they went	161
21	when they meet	155
22	when they did	147
23	when they 've	141
24	when they leave	138
25	when they say	138
26	when they find	132
27	when they saw	123
28	when they return	122
29	when they take	121
30	when they go	118