Adverb or Adjective?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hello,

I really hardly understand these two when they come after the verb.

A scientist works very hard.

Is (very hard) Adverb Phrase? consists of Adverb (very) and Adjective (hard) or both of them are adverbs?

2

Both of them are adverbs. Like ‘fast’, ‘hard’ can also function as an adjective or an adverb. The word ‘very’ is also termed as ‘intensifier’ in modern grammar.

3

Thanks.

Are these sentences correct? I mean can I use the adverb at the end of the sentence after the “Object”?

I broke the vase accidentally.
I accidentally broke the vase.

4

According to me, both are correct and acceptable. There is a slight difference in meaning, though.
The nuance can be this:
In the first, the emphasis is on ‘broke the vase’, and in the second, it is on ‘accidentally’.

5

Well,
This sentence always confuses me and I want any one expert to patiently explain to me.

I am studying the “Sentence Tree Diagram”, breaking the sentences into two parts (NP) and (VP).
and in this example:-

A fine Arab race horse is on sale this week at the Royal farm.

NP: A fine Arab race horse
A: Det
fine: Adj
Arab: Adj
race: Noun
horse: Noun

VP: is on sale this week at the Royal farm.
V: is
Prep P: on sale > Prep: on - Noun: sale
this week??? many people states it as a NP whereas this is considered a Determiner (Demonstrative Pronoun) and week: a Noun, while other people tell me it’s adverbial?