What is the uncontracted form? " I am a fish! " That's obvious.

不缩写的形式是怎样的？显然是“I am a fish! ”。

You need to use the full, uncontracted form if you need to emphasise the verb or negative.

如果您想强调某个动作或否定含义时， 需要用完整的无缩读方式。

So when you use the present continuous in writing, you are most likely going to use the uncontracted form.

因此， 当您在写作中使用现在进行时时，您很可能会使用未收缩的形式。