IV. Sentences transformation 1. How long is it since you used the car? => When ________________________________________________________? 2. How long is it since they moved here? =>When ________________________________________________________? 3. When did you first see her? =>How long _____________________________________________________? 4. When did you first know her ? =>How long _____________________________________________________? 5. When did you start working in that factory? =>How long _____________________________________________________? 6. How long is it since you saw Tom? =>When ________________________________________________________? 7. How long is it since you used the car?/ =>When _____________________________________________________ 8. How long is it since you saw Tom? => When _______________________________________________________? làm giúp vs cảm ơn ạ