1. is incorrect. It is simple present. A continuous structure requires an -ing form.
Student or Learner
Could you please hint to me, which tense was used in an every sentence:
1. This year is difficult for him (it's present continuous because we talk about temporary situation, right?)
2. The Sun is the largest star in the Solar System (it's present simple because we talk about permanent situation, right?)
I am always a little confused, when I need to use different tenses.
So, even if talk about current moment, but don't use -ing form, it will be present simple?
For example: 1. It is early hour now. 2. I am tired at the moment.
The terms 'simple' and 'continuous/progressive' refer to the form of the verb, not to the way in which it is used.
I am not a teacher.
Yes. That's a continuous/progressive form.
"It is early hour now" is not a grammatical sentence.
It is early now.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.