1
When 'bhi' or 'tak' means 'not even' (e.g., 'usne mujhe bataya tak nahi'), 'even' should not be placed at the start of the sentence, but immediately before the main verb.
2
Correct structure for 'even' with verbs: Subject + auxiliary verb + not + even + main verb (e.g., 'He did not even tell me').
3
Use 'that' for clear-cut, sure statements following a conjunction (e.g., 'I know that you will come').
4
Use 'if' when introducing a clause with uncertainty ('I don't know if you will come').
5
Use 'whether... or not' when presenting alternative possibilities ('I don't know whether you will come or not').
6
Do not use 'that' before a WH-family word (like who, what, how, where) in indirect clauses.
7
Indirect WH-clauses do not follow interrogative word order; the subject comes before the auxiliary verb (e.g., 'I know what he is thinking' instead of 'What is he thinking').
8
Maintain tense consistency: if the main clause is in the past tense, the dependent clause's auxiliary verb must also reflect the past (e.g., 'I knew what you were thinking').
9
For generalized actions without an explicit subject, use the infinitive structure with WH-words (e.g., 'how to fight', 'where to go').