They both are, in certain situations. For example, "By Tuesday, I had not received it". That's past tense. In present tense, "I have not received it".
"Have not received" is correct when referring to something that has not been received up to the present moment. "Had not received" is correct when referring to something that was not received at a specific point in the past.
A person who corrects your speech is often referred to as a grammarian, language coach, or speech coach.
Please provide the quotation in question so I can provide the correct edit for the punctuation.
Microsoft Word provides a feature called "Grammarly" that automatically corrects grammar and spelling mistakes in real-time as you type. It underlines errors with a wavy red or green line and offers suggestions for corrections to improve your writing.
A person who constantly corrects others' grammar is often referred to as a grammar Nazi.
To correct faulty parallelism, make sure that the items in a list are structured in a consistent manner. For example: "I enjoy cooking, reading, and taking long walks" instead of "I enjoy cooking, reading, and long walks."
yes
A person who corrects your speech is often referred to as a grammarian, language coach, or speech coach.
Nope, a negative meniscus lens corrects myopia. Positive meniscus corrects hyperopia.
Convex lens makes objects appear closer and corrects hyperopia (far-sightedness).
IS C IS CORRECT YES NO
I have no answer
your brain
brain
Spell Check
it prevents and corrects dehydration
yes since they don't have seeds
convex