@Loh Jane,
Quote:are my sentences acceptable below?
This one, above, isn't, Jane.
This one, below, is.
Are my sentences,
below, acceptable?
below
Quote:I was skeptical about acupuncture previously because Chinese medical certificates were not well recognized. However, I have trusted it as soon as a Chinese medical doctor cured my injury.
Setanta made note that you should drop 'have', which I've underlined above. The reason that it sounds odd here is that when the present perfect is [almost always] used to denote a past action that is current to now, ie. a hot topic, we don't combine it in the same sentence with an adjunct [addition] that notes a past time period or event -->"as soon as a Chinese medical doctor cured my injury".
You could say the following;
I was skeptical about acupuncture previously because Chinese medical certificates were not well recognized. However, I have come to trust it. That happened as soon as a Chinese medical doctor cured my injury.
Another example:
I went to London.
An excited individual
I've been to London!
*??I've been to London last week!??*
[* denotes ungrammatical]
Though it isn't ungrammatical, it is used sometimes for special reasons that I won't describe just now, it is a strange occurrence for native speakers to put the present perfect with a past time adverbial adjunct, in this case - 'last week'.
We would separate the two.
I've been to London! I went last week.