Sure...
eg Q and spacebar starts the trim command
Q and two hits to the space bar starts global trim, and holding
shift turns it into extend, let go of shift, its back to trim.
Do you use grips with the spacebar?...Another world.
Q, *TRIM
W, *MOVE
E, *EXTEND
R, *ROTATE
A, *OFFSET
S, *STRETCH
D, *DIST
F, *FILLET
G, *CHAMFER
H, *BHATCH
O, *OPEN
P, *PRINT
REC, *RECTANGLE
REV, *REVCLOUD
13, *CIRCLE
11, *PLINE
1, *LINE
2, *COPY
3, *ERASEQ
4, *MATCHPROP
5, *MIRROR
6, *PROPERTIES
66, *PROPERTIESCLOSE
7, *DIVIDE
S1, *SPLINE
XX, *XLINE
`, *UNDO