Let’s look at an example of ‘should be ing‘ in student writing:
In Korea, it is so common that women should be looking for a job after divorce.
PELIC Korean female level 4 writing.
‘Should’ can express obligation or expectation. ‘Should’ can be used with a continuous form:
Should be + lookING
In the English Grammar Profile at B2, there are 3 points covering ‘should + continuous form’. Points 141 (general), 164, and 177 in Modality are used for either obligation or expectation.
A search for should be _v?g*
in the iWeb corpus finds the following present participles:
1 SHOULD BE DOING 24974
Further collocates 4 left and right:
1 WHAT (DDQ ) 7756
2 SOMETHING (PN1 ) 1554
3 THINGS (NN2 ) 1303
4 THING (NN1 ) 600
5 ELSE (RR ) 544
6 EVERYTHING (PN1 ) 476
7 ANYWAY (RR ) 455
8 DIFFERENTLY (RR ) 152
9 HOMEWORK (NN1 ) 82
10 THINKS (VVZ ) 62
Here’s a long list of the 20 most common VERB-ING after ‘should be’:
2 LOOKING 14641 | 3 USING 12086 | 4 GETTING 8297 | 5 WORKING 6485 | 6 TAKING 5622 | 7 ASKING 5531 | 8 THINKING 3931 | 9 GOING 3911 | 10 MAKING 3902 | 11 EATING 3855 | 12 PAYING 3595
13 SHOULD BE FOCUSING
14 RUNNING 2754 | 15 COMING 2380 | 16 TRYING 2377 | 17 PLAYING 2339 | 18 SEEING 1908 | 19 AIMING 1905
20 SPENDING 1860