 Webi wrote: |
| OR could you please explain for me the usage of the present perfect and past simple tense in the "since clause"? |
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The “since” clause is one of the common ways used with past and present perfect tense.
I’ve lived at the same address since I came to California.
I have worked for the same company since I graduated from college.
There are situations where present perfect tense is used by itself without any indication of time in the context, but it's implied. i.e. I have looked at the report you e-mailed me. I will get back to you in a couple of days. This statement tells the party who sent you the report that since he received it, he has briefly viewed the report. That’s it.
Other examples with no written time constrains:
I have heard about the new “buckle-up” law. .
I have seen that movie many times and I still want to see it again.
He has asked me to borrow my car many times and I am beginning to feel as if he is taking advantage of my generous nature.