The dative of the gerund and gerundive is used after adjectives, Such are accommodātus , aptus , ineptus , bonus , habilis , idōneus , pār , ūtilis , inūtilis . But the accusative with ad is common with most of these (cf. § 385 . a ). especially those which denote fitness or adaptability: — genus armōrum aptum tegendīs corporibus (Liv. 32.10) , a sort of armor suited to the defence of the body. reliqua tempora dēmetendīs frūctibus et percipiendīs accommodāta sunt (Cat. M. 70) , the other seasons are fitted to reap and gather in the harvest. perferendīs mīlitum mandātīs idōneus (Tac. Ann. 1.23) , suitable for carrying out the instructions of the soldiers. This construction is very common in Livy and later writers, infrequent in classical prose.