~ませんか => Let's…, Would you like to... N5
Verb suffixes
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
て下さいませんか => Please do A (polite) N5
Asking and Telling
にひきかえ => In contrast to A N1
Comparison/ Exchange
をくださいませんか => Please give me A (polite) N5
Asking and Telling
~ます/~ません => Polite, present form N5
Verb suffixes
[謙譲語「けんじょうご」] => Humble form of A, humble form of する verbs N4
Honorifics
んばかり => Seems like A, Seems as if A N1
Adjectival, Descriptions
~ましょう。 => Let's (together), Shall I/we…? N5
Verb suffixes
せいで/せいか => Because of A, B N3
Reason, Result, Response
でしょう => I think... Probably.., I wonder if... N5
Miscellaneous
つもりだ => Plan to, be going to N4
Sentence Endings