Why is that that grammatically correct?

The first “that” is a conjunction—it introduces a subordinate clause that’s the object of the main clause (“I can see”). The second “that” is a demonstrative pronoun and the subject of the subordinate clause (“that is going to be a problem”). (2) “I received this this morning.”

What is the correct use of had?

When you need to talk about two things that happened in the past and one event started and finished before the other one started, place “had” before the main verb for the event that happened first. Here are some more examples of when to use “had” in a sentence: “Chloe had walked the dog before he fell asleep.”

Is Had you correct?

“Had you filled the jug” asks if you performed an action in the distant past. “Did you fill the jug?” asks if you did it in the immediate past or even present. If you are asking about history, it’s “had you”, If you are asking about current affairs it’s “did you”?

Is it bad to use that that?

Sometimes it’s a judgment call. But don’t let your desire to lop off unnecessary words lead you into bad judgment. As a rule of thumb in questionable cases, remember: Using “that” is never really wrong, though it may be unnecessary; omitting “that” in some cases indeed may be wrong.

Why is ‘why you did that’ wrong?

Don’t be afraid to make mistakes and keep asking questions and you’ll get the hang of it! “Why you did that” is wrong merely because of the sentence structure. The other guy is right to correct it to “why did you do that”. You must state the tenses clearly and somewhat early.

Why is the sentence ‘why you did that’ wrong?

“Why you did that” is wrong merely because of the sentence structure. The other guy is right to correct it to “why did you do that”. You must state the tenses clearly and somewhat early. It’s like saying “He ran had before” when really it’s “He had ran before.”

Is “had had” grammatically correct?

Yes, it is; the verb to havemay be governed by past perfect, rendering use of “had had” not only grammatical but actually very common in usage. – Robusto

When do you use he or she in a sentence?

Whenever you use “he or she” you are using the third person singular so you would have to use has or had in those cases. She has been working for that company for 2 years. He has been studying English for a year. As for the other examples you could have to use has. She has a wallet. He has a car. When do we use have?