We can rewrite the incorrect sentence as follows; In the past couple of weeks, nothing interesting has happened.
How to rewrite the sentence
To rewrite the sentence means that we have to evaluate the grammar to know what is odd and adjust it. In the given sentence, we can begin by specifying the fact that In the past couple of weeks, nothing interesting has happened.
So, we use the comma which is a punctuation to separate the initial phrase from the rest. The ordering also avoids passive speech which is more difficult to understand. The above is the corrected form of the sentence given.
Complete Question:
Rewrite incorrect sentences
Nothing interesting has happened in past couple of weeks.