No, the sentence 'The researcher with all his assistants explain such claimed to be true' does NOT use correct grammar.
Correct examples:
Better:
Note: "All of his assistants" isn't really needed because it is assumed most researchers have assistants. The assistants typically do not take public credit, or defend the claims, unless they were on the team of chief researchers or the assistants present the results on behalf of the researcher.
"As true" is not unnecessary if you use the verb defended.
Yes, that is a correct sentence.
No, the correct sentence should be "Had you taken the test before?"
Yes, the sentence is correct.
The correct sentence is 'I will come home at 3pm'.
The correct sentence is the following: "What were you doing from before?"
Explain why it is not correct then reformulate a new hypothosis.
That is the correct spelling of "claimed" (alleged ownership).
"How are you" is a correct sentence.
Yes, this sentence is correct.
You are palpitating. This is a correct sentence.
no it is not a correct sentence.
That sentence is grammatically correct.
Yes, that is a correct sentence.
no_____If the sentence is You do do that (meaning You are in the habit of doing that) the grammar is perfectly correct and the sentence 'does have correct grammar'.
All of these answers are correct
With the exception of not capitalizing the 'y' at the start of the sentence, it is a correct sentence.
"You and him" is correct in a sentence such as, "I sent the tickets to you and him," versus a sentence such as, "You and he should send the tickets to me."