Normally, sentences with additional information should start with phrases like "In addition," "Besides,". However, sentences often start "and", "but", "or" in colloquial speech or in journalism , but it is not a good style. Besides, when you write an IELTS essay it may even be regarded as a point contributing to a lower qualification and it is clearly explained in IELTS traning materials.
Yes, "The house is not as cheap as he thought" is proper grammar.
"She did not have" is the proper grammar.
It is when verbs in a sentence match because they are in the same tense.
"If" makes it conditional, so "... what would you do?" would be proper.
It would depend on how it is used in a sentence. It is proper if you say "She was offended that he called her a name." or "He accidently offended that man." However, it cannot stand alone as a complete sentence.
Why she asked me, I'll never know. "Why" is not the primary question here.
Yes, starting a sentence with "then" is grammatically correct, especially when showing a sequence of events or actions. However, it is usually used sparingly to avoid overuse and maintain variety in sentence structure.
no, that is definitely not proper grammar.
No
No
The proper grammar for that sentence is "She was much better than yesterday." This sentence is in the past tense and correctly compares her current state to how she was yesterday.
The sentence "I wish you were as smart as they." is grammatically correct. It is shortened from "... as smart as they are."
Yes, "The house is not as cheap as he thought" is proper grammar.
Yes. That sentence is proper as written.
The proper grammar is "There has come a time." "There" is the subject of the sentence and is singular, hence the correct verb form to use is "has" instead of "have."
Yes. For example, What did she point at ? However, do not use 'at' with 'where.'
The proper grammar is "a urinary" because the word "urinary" begins with a consonant sound, even though the first letter is a vowel.