An ambitious player is often destined to win.
...... is often destined to win.

Big-headed people are often difficult to reason with.
...... are often difficult to reason with.

My brother-in-law is going on holiday to Africa next month.
...... is going on holiday to Africa next month.

My daughter and I are going to visit our grandparents in Austria next week.
...... are going to visit our grandparents in Austria next week.

Little Phillip and Simon are very naughty when left alone.
...... are very naughty when left alone.

Lilly and I have a lot in common.
...... have a lot in common.

Marc and David, come here immediately!
...... , come here immediately!

The head nurse would like to present her ideas to the head surgeon next week.

Mr and Mrs Potter have been married for quite a few years now.
...... have been married for quite a few years now.

Our cousins are staying with their friends for the time being.
...... are staying with their friends for the time being.

The book is in a terrible state. What have you been doing with it?
...... is in a terrible state. What have you been doing with it?

Some of the children are playing outside.
...... are playing outside.