The first thing to figure out is the vocabulary you're going to need to say this. We need the phrase 'in Urlaub fahren' to say 'go on holiday' and the word for France, which is 'Frankreich'.For the present tense we're going to need the third person present form of the verb 'fahren', which is 'fährt' - notice that the vowel changes from 'a' to 'ä' in this form. We then need to remember which word for 'to' to use here. Because France is a specific place with a name, we have to use 'nach' instead of 'zu'.So we should construct this sentence as - Sie fährt in Urlaub nach Frankreich.To form the future tense remember that we need to use the conjugated form of the auxiliary verb 'werden' and the infinitive of 'fahren'. Everything else can stay the same because we are only changing the tense of the verb. Therefore the sentence in the future is - Sie wird in Urlaub nach Frankreich fahren.The past tense is a little bit tougher because we have to work out which auxiliary verb to use, either 'haben' or 'sein'. Because this sentence involves movement, since the person is travelling to France, we have to use the correct form of 'sein', which is 'ist'. We then need to remember the past participle of 'fahren', which must go at the end of the sentence. To form this we add 'ge-' to the start of the verb, and although we would usually add '-t' to the end, 'fahren' is a 'strong verb' so we don't have to. This means that the past participle of 'fahren' is 'gefahren'. So, to translate this sentence into the past tense we would get - Sie ist in Urlaub nach Frankreich gefahren.