-2

"The only thing holding me back is the available colours."

or

"The only thing holding me back are the available colours."

It seems to me like a glitch either way. I slightly favour the second one though.

2

The rule is simple. The verb agrees with the subject of the sentence.

The only thing...is... [correct]

The only thing...are... [incorrect]

|improve this answer|||||
0

You can say 'The only thing is' or 'The only things are', but you can not say 'the only thing are'

|improve this answer|||||

Not the answer you're looking for? Browse other questions tagged or ask your own question.