chia quá khứ đơn hoặc quá khứ tiếp diễn
1. Ba (talk) ________ with his classmate when the principal (enter)______ their classroom
2. While I (cross) _____ the street, I(step) ________ on a banana skin and ( fall) _____ heavily
3. It (begin)______ to rain when I ( plant ) ______ some flowers in the garden
4. When I (arrive )______, the teacher (write)______ on the blackboard
5. When they (walk) _____ down the stairs, they (hear)_____ a strange noise
giúp mình với! mình cần gấp
chia quá khứ đơn hoặc quá khứ tiếp diễn
1. Ba (talk) ____was talking____ with his classmate when the principal (enter)___entered____ their classroom
2. While I (cross) ___was crossing___ the street, I(step) ___stepped_____ on a banana skin and ( fall) ___fell__ heavily
3. It (begin)__began_____ to rain when I ( plant ) __was planting_____ some flowers in the garden
4. When I (arrive )___arrived___, the teacher (write)__was writing____ on the blackboard
5. When they (walk) _were walking_____ down the stairs, they (hear)__heard___ a strange noise
1 was talking/ enterred
2 was crossing/stepped/falled
3 was biginning/planted
4 arived/ was writing
5 walked/ were hearing