1. 不熟悉現在進行式
I'm study English now
\ > I’m studying English now.
when I working
\ > when I’m working
2. 不熟悉不定詞
we have to meeting with our clients
\ > we have to meet with our clients
I like to running.
\ > I like to run. / I like running.
3. 詞彙誤用 > 形容工作的時候
I'm a customer service.
I'm a sales.