簡單英語文法 (四)

1. John sent his laptop to repair (You just can express 他以前 sent過)
Using present perfect is correct BECAUSE the action connects the past to
the present .
John has sent his laptop to repair = His laptop is being repaired and he
can't use it now .

You can also use a pattern called have something done
John is having his laptop repaired = His laptop is being repaired by others ,
but not himself

2. You should say "Have I met him before ?"
We only use past perfect tense when there is two past actions for us to compare

Ex. When I arrived , the bus had already gone . = I arrived after the bus
went
We use simple past tense when there is a single action
ex. I was a teacher ten years ago

For your case , we use present perfect tense to talk about experience .

3. I haven't been here before . You can only use past perfect when there are two past actions

4. Do you want some ice-cream?
You may say : Certainly / Of course / Sure .....

JOHN的電腦拿了去維修 ((John's PC was taken to repair))

我之前有冇見過佢 ((did i meet him before?))

我之前未黎過依度 ((I never come here before))

你之前有冇食過雪糕? ((didn't you eat ice-cream before?))

問:Do you want some ice-cream?
答:我正想要 (sure)