Helping verbs are verbs that help the main verb in a sentence by extending its meaning. They can also add detail to how time is conveyed in a sentence. As a result, helping verbs are used to create the most complicated verb tenses in English: the progressive and the perfect aspects.
Answer:
1) whether he thinks too little or too much
2) still by himself abused or disabused
3) describe or fix one movement of his mind
