Ĉiutage = Daily. Laŭtage = By the day. Tage = By day. Nokte = By night.
Ĉu = Whether. An interrogative adverb used at the beginning of a direct question; it has no English equivalent. Ĉu simply shows that the sentence is interrogative, and therefore, to translate it, we must look to the tense of the verb and to the subject, so as to preface the interrogation with "do," "does," "did," "have," "has," "is," "will," "shall," "was," "were," "should," "would," "can," etc. etc.
Examples.—Ĉu vi komprenis? = Did you understand? Ĉu Johano skribas? = Is John writing? Ĉu vi povas fari tion? = Can you do that? (see remarks on Interrogation, par. [58]).
Ĉu = whether (or if in the sense of whether) (a conjunction) is used in indirect questions, when we generally use "if."
Examples.—Diru al mi, ĉu li venos = Tell me if (whether) he will come. Diru al mi, se li venos = Tell me if he comes.
Ĉu ... Ĉu = Whether ... whether.
Example.—Ĉu li venos, ĉu li ne venos, Paŭlo foriros = Whether he comes (will come) (or) whether he does not (will not come), Paul will depart.
Dekstre = On the right. Maldekstren = To the left.
Denove = Afresh, again, once again.
Due = Secondly, in the second place.