What is meant by "Some participles wanted" comment by e-grader?

Hello All,

In most of my essays, I generally get a feedback by e-grader and it says, "Some participles wanted". For example, in this essay here: http://www.testbig.com/ielts-writing-task-ii-ielts-academic-essays/1you…

Participles: 0.0186335403727 0.0403226058552 46% => Some participles wanted.

What is meant by it? Can someone please explain this to me?

Forums

'Participle' means a word formed from a verb (e.g., going , gone , being , been ) and used as an adjective (e.g., working woman , burned toast ) or a noun (e.g., good breeding ). In English, participles are also used to make compound verb forms (e.g., is going , has been ).

'Some participles wanted.' means 'More participles wanted.' since the percentage is 46% which is lower than the average percentages.