He can't string a sentence together, so good luck.
The Sun
They saw me barely able to string a sentence together and looking like s*** most of the time.
The Sun
The final straw was his inability to string a sentence together.
Times, Sunday Times
Then he'd be slobbering and couldn't string a sentence together.
Times, Sunday Times
When interviewed, these so-called idols often struggle to string a sentence together.
The Sun