1) charles iv est mort sans héritier. true false 2) explain the grammar in this sentence: je veux que mes cousins puissent voyager.

Hi !

1- Charles IV est mort sans héritier.
TRUE

2) Explain the grammar in this sentence :
"Je veux que mes cousins puissent voyager."
"Puissent" is the subjunctive tense of the verb "pouvoir".
SUBJUNCTIVE TENSE
Usually, you must have two different persons in the main clause and the dependant clause. (otherwise you would use infinitive = je veux pouvoir voyager (I want to be able to travel))
The verbs + que + subjunctive usually express = wish, order, likes or dislikes,regrets, doubts
Many expressions are followed by subjunctive as "il faut que", "il vaut mieux que", "afin que", "bien que", "quoique", "pourvu que", "avant que"

Exemples =
je regrette qu'il ne puisse venir (I regret that he cannot come)
Il faut que tu apprennes ta leçon ( you have to learn your lesson)

hope I helped a little :)

Hi ! est-ce que vou voulez voyager en france ? (do you want to travel to france ? )b- oui, je veux y voyager. ( yes, i want to travel there)"y" usaually replace a place have to use it in front of the verb to which it refers (here, it's "voyager")"en" is more likely to refers to as "j'en voudrais une part" =" i would like a piece of it""je lui en ai parlé" = i spoke to him/her about itwel, of course, as in french grammar, many exceptions ! hope i !