Подчеркните инфинитив в составе сложного дополнения. she always thought him to be right. i could never understand what made her do that. the parents expected the teacher to improve the child's speech. we expect this statement to be true.

She always thought him to be( to be инфинитив) right.
I could never understand what made her do (do-bare infinitive-«голый» инфинитив без частицы to )that.
The parents expected the teacher to improve( to improve-инфинитив) the child's speech.
We expect this statement to be ( to be-инфинитив) true.