1. Mr Pike last went to work by motorbike three years ago, didn’t he?

Mr Pike hasn't gone to work by motorbike for three years , has he ?

2. I broke the cup as I was careless.

Because of being careless, I broke the cup . 

3.The boys are watching a thrilling film.

The film which the boys are watching is thrilling .

4. The working people have considered May Day a great holiday.

May Day has been considered a great holiday by the working people.

1. Mr Pike last went to work by motorbike three years ago, didn’t he?

$\to$Mr Pike hasn't gone to work by motorbike for three years , has he ?

2. I broke the cup as I was careless.

$\to$Because of being careless, I broke the cup . 

3.The boys are watching a thrilling film.

$\to$ The film which the boys are watching is thrilling .

4. The working people have considered May Day a great holiday.

$\to$May Day has been considered a great holiday by the working people.