What two letters in a verb's ending might indicate a "passive periphrastic/gerundive of obligation", with the "must be" translation?

A passive periphrastic/gerundive of obligation uses "nd" in the ending of the verb's stem. Additionally, what other work must be included or implied to accurately create the "MUST BE" translation?

Which is the most applicable translation for the following Latin sentence?

"Omnia bella pugnanda sunt ferociter."

Which is the most applicable translation for the following Latin sentence?

"Militēs Caesarī ducendī sunt."

An ablative absolute construction

Which of the following BEST resembles the use of the ablative absolute?

Which of the following can NOT be a construction for the ablative absolute?

Link the ablative absolute constructions below to their best meaning.

Deponent verbs are verbs that look passive, but always translate actively. 

Match the deponent verb infinitive to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Match the following principle part verb forms to its best meaning.

Sort the following infinitives into two categories: active "to do" and passive "to be done."

Which infinitive below means "to be removed"?

Which infinitive below means "to be killed"?

Which infinitive below means "to be called"?