How would you say, "this cat?" For example,
"Can I pet the cat?" "Which one? This cat?"
This: цей (masculine) / ця (feminine) / це (neuter)
That: той (masculine) / та (feminine) / те (neuter)
In the example you gave, "this cat" is accusative, as in the question "whom?". So here it would be "Я можу погладити кота?" — "Якого кота? Цього кота?" This is a bit too early for you in this lesson, but I felt like I should bring this up for more advanced, but not yet fluent learners who might look here.
Thanks. Do you know, if we replaced ‘кіт’ with a neuter noun here, would the sentence become ambiguous?
In this case, це is not a demonstrative adjective, it is a participle and does not decline or change form. The adjective is цей which only happens to take the form це in the nominative neuter. Make sense?
Yes, I got that, but I wondered if this noun might be nominative neuter. (But no, it's masculine.)
I see now. In answer to your question, yes. In the nominative, it is ambiguous: це сонце could be either "this sun" or "this is the/a sun." In other cases, цей declines. But even in the nominative, it's not usually confusing.