Questions about the pronoun y
Q: Why is it j'y vais and NOT je vais là?
As with other pronouns, it is recommended that you indicate location by using y in front of the verb.
Q: Why is it j'y pense and NOT je pense à cela?
Use y before the verb rather than another pronominal after it.
Q: Why is it j'y crois and NOT je y crois?
Since y is pronounced as a vowel, the pronoun je becomes j'y.
Q: Why is it il y a des gens and NOT il y ont des gens?
The expression il y a never changes, even when the following noun is plural.