English grammar interview questions

I read the reply once for meaning and once only for the verbs, checking tense and agreement. I also check articles before singular nouns, because that is where my mistakes usually appear. For longer emails I read the text aloud, which helps me catch missing words.

"I sent the file" is past simple and usually comes with a finished time, like yesterday. "I have sent the file" is present perfect and focuses on the result now, so the customer should check their inbox. I would not use "have sent" together with "yesterday".

The correct version is "I have been working here for two years." An action that started in the past and continues now needs the present perfect continuous. "For" goes with a length of time, while "since" needs a starting point, as in "since 2023".

It depends on the first sound of the next word, not the letter. So I write "an hour" because the h is silent, but "a user" because it starts with a "yoo" sound. Saying the word quietly before writing it settles most cases.

I reply in short, simple sentences with common words and one idea per sentence. I do not correct their English or copy their mistakes. If something is unclear, I restate what I understood and ask them to confirm, for example: "You were charged twice for order 4521. Is that right?"

First I try to rewrite the sentence in a simpler way that avoids the doubt, which is usually possible in a customer reply. If I still need that structure, I check a grammar reference or the team's approved templates. I note the rule afterwards so I do not need to look it up again.