i have been teaching since 2006中的teach为什么要加ing?
i have been teaching since 2006中的teach为什么要加ing?
teaching 为什么要加ing
I have been teaching English since 1986.改为同义句
ihavebeenteachingsince10yearsago为什么teach要加ing
I have been sick since yesterday.中have been 是什么是时态为什么要用been.
I have been teaching in this school since three years ago.变同
I have been like this since last month 的句意没有表示被动啊为什么还要加been
He must have been dreaming为什么加ing
how long have you been studying为什么后面要加ing
为什么i will go swiming 中的swiming要加ing,
being 为什么要加ing?teach为什要加ing?不是spend to do sth
i have been to shanghai为什么加been?