Verb Subject Tense agreement
"tasks" is not being recognized as a noun by the program.
As their self-involvement in the lesson increased, so did their self-confidence: they even performed tasks that were not in the script, like answering questions or re-playing slides for clarification.
"Tasks" can be a noun or a verb--depending on how it's used in the sentence. There's no problem with using "tasks" as it appears in the sentence you posted. Computer spell checkers and grammar checkers can alert us to potential problems, but they aren't perfect.
|link comment||answered May 31 '13 at 03:24 Dr. G Contributor|