1.   I doubt my ability for it.

2.   No one doubts his ability to get work done quickly.

3.   She would have liked to be nearer to the panel, but she doubted her ability to kneel or squat in the spacesuit.

4.   Some doubted its ability to withstand rough weather.

5.   No one doubted his ability.

6.   She doubted his ability to succeed.

7.   But still she doubted her ability to hold out against him.

8.   Though a successful player with Spurs and England, many doubted his ability to repeat the achievement of Ossie Ardiles by earning a place in the First Division.