Unit6Howlonghaveyoubeencollectingshells
ByQiWenhui•IstartedteachingEnglishin1994
•IamstillteachingEnglishnow
•HowlonghaveIbeenteachingEnglish
IhavebeenteachingEnglishforover12years
since1994
*Hestartedteachingmathwhenhewas20yearsold
Heis50yearsoldnowandheisstillteachingmath
Howlonghashebeenteachingmath
Hehasbeenteachingmath30yearsago
for30years
sincehewas20yearsold
2hoursHowlonghasshebeenreading
Shehasbeenreadingfor2hours
Shehasbeenreadingsince2hoursago
halfanhourHowlonghashebeenplayingcomputergames
Hehasbeenplayingcomputergamesforhalfanhour
sincehalfanhourago
45minutesHowlonghavetheybeenplayingsoccer
Theyhavebeenplayingsoccerfor45minutes
since45minutesago
anhourHowlonghavetheybeenswimming
Theyhavebeenswimmingforanhour
sinceanhourago
15minutesHowlonghashebeendrawingapicture
Hehasbeendrawin