Chinese uses "is" much more rarely than english. And that's something it takes a while to get used to. For example 中國很大 ("China is very big", literally "China very big") But for a while you'll be tempted to add an "is" in there. In fact you can use an "is" to change the emphasis. Eg. "中國是很大的" (literally "China is very big adjective modifier ")
On a tangent, Thai lacks "yes" and "no", and in theory one signals assent by repeating the verb or adjective, with or without a negative modifier. "Hungry, or?" - "Not hungry" "Take, no?" - "Take" In practice, people will often grunt for yes, and shake their head and break eye contact for no.
"Do you want an ice cream?" "want"