"The boy drinks the milk."
Translation:De jongen drinkt de melk.
Impossible, getting the definite article wrong sounds more wrong that mispronouncing the word (even when severely butchering it like milehook or maylike (actually those does do not sound that far off..). It is the thing that most stand out when foreigners try to speak the langauge.
I guess it would be a similar feeling when in English refer to this book as these book. (But worse).
People will think you are pretty good when you have the correct word order and definite articles, no matter how much of an accent or mispronunciation you have.
You will use Drink when it's accompanied by Ik. For example, each verb has conjugations. When it is just I or in dutch "Ik" it will be accompanied with just the word milk.
When it is "Je" (meaning you, singular pronoun), "Hij" (meaning he), "Zij" (meaning she) you want to have the original word, which in this situation "Drink" and add the "-t" at the end of it to have the end product "drink".
Lastly, when you have multiple pronouns such as "Ons" (meaning us), "Wij" (meaning we), and just the plain "We" (also meaning we) it will end the word in an "-en" affix. Showing how it would result in "Drinken".
These are just the basic meanings, although some words can go into more detail or stray from these grammatical rules altogether.
De sap is wrong. Sap is a neuter word so it is het sap. If you just know/see the word and how no ideal of the article, just check wiktionary (or an ordinary dictionary ;) ).
These both take de
And this takes het as the definite article
Haha female mammals. No the names and articles for things are just that names, there is no scientific reasoning behind it. Otherwise, does a table only come from female trees?
However things that biological have a gender, people, animals. Do, obviously, follow the same gender. Though you actually only need to know if a word is neuter or not. Since neuter word use het and both mascline and feminine use de. (Only in the case of refering back to things it is helpful, like we saw the river/mountain she/he was long/lhigh. But even then it doesn't matter much, most people usually just refer back with hij.