Unique rules when forming that grammar are highlighted like this.
Example sentences follow these rules too!
Joining and Nesting Markers:
Verb[た/る] - means that dictionary form and ta form are accepted.
Verb[causative[て]] - means て form of the causative form of the verb.
さぞ is an old-fashioned expression meaning “no doubt”, “indeed”, or “very”, and is used together with (こと)だろう and similar phrases to state conjecture about another person state of mind, usually to express sympathy and compassion. Rarely used in daily life, more of a written expression that is used in letters and so on.