The dragon / fly over/ when / he / hear / the princess / cry / help.
A. The dragon was flying over when he was hearing the princess to cry for help.
B. The dragon was flying over when he heard the princess crying for help.
C. The dragon flew over when he was hearing the princess cry for help.
D. The dragon flew over when he heard the princess to cry for help
B ( thì quá khứ tiếp diễn)
diễn tả 1 hành động xảy ra thì 1 hành động khác xen vào “when”
The dragon / fly over/ when / he / hear / the princess / cry / help.
A. The dragon was flying over when he was hearing the princess to cry for help.
B. The dragon was flying over when he heard the princess crying for help.
C. The dragon flew over when he was hearing the princess cry for help.
D. The dragon flew over when he heard the princess to cry for help