Summary

Portrait of George Martin Lane George Martin Lane A Latin Grammar for Schools and Colleges

A root is not a real word; it is neither a noun, naming something, nor a verb, denoting action. Thus iug-, yoke, does not mean a yoke nor I yoke; it merely suggests something about yoking. The root becomes a real word only when an inflection ending is added, or, more commonly, both a formative suffix and an inflection ending: as, iug-u-m, a yoke.
185. Roots are common to Latin and its cognate languages, such as the Sanskrit and the Greek. When a root is named in this book, the specific Latin form of the root is meant.
Source: Gutenberg

Portrait of George Martin Lane George Martin Lane A Latin Grammar for Schools and Colleges

The future perfect indicative expresses completed future action: as,
scrīpserō, I shall have written, or I will have written. The future perfect is very common in Latin, particularly in protasis with a relative, with cum, ubī̆, &c., with antequam or priusquam, with ut (... ita) , as (... so) , or with sī, to express action anterior in time to a future; in English, this future perfect is usually represented by a loose present or perfect: as, quicquid fēceris, adprobābō, Fam. 3, 3, 2, whatever you do, I shall think right. Examples will be given further on, in speaking of the complex sentence.
Source: Gutenberg

Portrait of George Martin Lane George Martin Lane A Latin Grammar for Schools and Colleges

The nominative of the gerundive construction, as the subject of sum, denotes action which is to be done.
The combination acquires the meaning of obligation or propriety, and this meaning also passes over to the accusative with esse. The person who has the action to do is put in the dative of the possessor (1215) . Instead of the dative, the ablative with ab is sometimes used, particularly where the dative would be ambiguous.
Source: Gutenberg

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