II/ S + began/started + Ving/ to V1 + in/on/at + time
<-> S + have/has + V3 .. since +
1. We began studying Chinese in 2019.
=> We have studied Chinese since 2019.
2. She began to water the trees at six o`clock.
=>She ___________________________
3. They started working here last year.
=> They _______________________
4. He has collected stamps since 2020.
=>He began ________________________
1. We began studying Chinese in 2019.
=> We have studied Chinese since 2019.
2. She began to water the trees at six o`clock.
=>She has ___watered the trees since six o'clock.___
3. They started working here last year.
=> They ____have worked here since last year.___________________
4. He has collected stamps since 2020.
=>He began ____collecting stamps in 2020____________________
2. She has watered the trees since six o'clock
3. They have worked here since last year
4. He began collecting in 2020
2. She has watered the trees since 6o'clock.
3. They have worked hare since last year.
4. He began collecting stamps in 2000
2. She began to water the trees at six o`clock.
=>She ______has watered the trees since 6 o'clock _______
3. They started working here last year.
=> They ______have worked here since last year_____
4. He has collected stamps since 2020.
=>He began ______collecting stamps since 2020 ____
