"These girls do not drink water."
Translation:ये लड़कियाँ पानी नहीं पीती हैं।
Nahin is used to negate an action with respect to an object and therefore goes between the object and the verb. However it can follow the verb, if you intend making a more general statement rather than a specific statement. The ending with a hai or hain (generic verb) is necessary in case you put the negation after the transitive verb, in this case peete. Hope this helps
A good question you asked.......I speak Hindi so I can answer your, In English the plural form of 'Is' is 'Are' and of 'Was' is 'Were' so just in Hindi the plural form of 'है' is 'हैं', (the difference is of the point above the है part) and the plural form of 'थी/थी' is ’थें'
Only the masculine plural changes from -ता [taa] to -ते [teh]. The feminine plural ending is still -ती [tii]. This happens for all plural forms -- आप लोह, तुम लोह, ये, वे etc. if the group is entirely women, girls, or feminine nouns of some sort (cows, cars, books, etc.). (If the group is both men and women, then the masculine plural will be used.)
जूलिया और नेहा, तुम कहाँ खाती हो? Julia and Neha, when do you typically eat?
जूलिया और राज, तुम कहाँ खाते हो? Julia and Raj, when do you typically eat?
You can apply this pattern to basically all conjugated verb forms.