Упражнение

a) go – …
b) come – …
c) bring – …
d) do – …
e) write – …
f) read – …
g) be – …
h) take – …
i) give – …
j) put – …
k) swim – …
l) buy – …
m) sell – …
n) say – …
o) tell – …
p) pay – …
q) understand – …
r) think – …

a) go – went — gone
b) come – came — come
c) bring – brought — brought
d) do – did — done
e) write – wrote — written
f) read – read — read
g) be – was, were — been
h) take – took — taken
i) give – gave — given
j) put – put — put
k) swim – swam — swum
l) buy – bought — bought
m) sell – sold — sold
n) say – said — said
o) tell – told — told
p) pay – paid — paid
q) understand – understood — understood
r) think – thought — thought