I BOUGHT A CAR.
HE SAID THAT…
HE WENT TO CHINA.
Finished action is remotely equivalent to past tense and sometimes present perfect in English
To indicate that the ACTION is finished, we put 了 /le/ right after the verb
ACTIONS are verbs like: TO BUY, TO GO, TO DRINK
ACTIONS aren’t verbs like: TO KNOW, TO WANT, TO FEEL
These are STATES and can’t be “finished”. They remain in the present form
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