~させてください is used when you are asking for permission, “Please let me ~.” ~させてくださる is to express gratitude to someone for letting me do ~.
~させていただく/させていただきます
~させていただく/させていただきます is a humble, very peculiar way of talking about your action. See more examples to learn this pattern here.
~さえ・・・ば、—。
~さえ・・・ば、—。 is an expression that is used when just one thing is missing from fulfilling a condition. From that, it can mean “if only ~” or “As long as ~.”
~さえ/~でさえ
~さえ is often used to mention an extreme example so that people can guess the rest of the situation. Check the usage and more examples.
~さえ
~さえ has 3 meanings. Today’s post talks about さえ which is used for accumulation. Check the usage with these examples.
~まで (for extent)
~まで is usually introduced as the end point marking particle but ~まで is also used as a limit marker and a particle to emphasise the extreme nature of a situation
~こむ
こむ is a verb that has the meaning of “to be crowded” or “to be packed,” but ~こむ is also used as an auxiliary verb that follows the stem of a verb.
~さい(際)
~さい is a very formal alternative for ~とき, which can be translated as “when ~” or “at the time when ~.” ~さい is often used with in an honorific expression.
~さいちゅう(に)/まっさいちゅう(に)
~さいちゅう means “middle of ~” and often used in a rather negative situation where something (usually unexpected) happened in the middle of something important.
~ことはない/こともない
~ことはない is a phrase to give an advice and it means “you shouldn’t ~” or “you don’t need to ~.” You can rephrase it as ~なくていい.
~ことになっている/こととなっている
~ことになっている/こととなっている is an expression used to explain established rules. You can use it as a gentle reminder. It is derived from ~ことになる.
~ことに/~ことには
~ことに/~ことには is an expression used to mention how the speaker feels about the situation. It can be translated as “to one’s ~.”
~こと/~ことだ
This post is about the ~こと that is used as a command or a suggestion. ~こと is a reasonably gentle plain form command and often used in the point form.
~ことから…
~ことから… is a rather formal expression to describe the origin or history behind a name/nickname. It can be used to describe a reason for an established fact.
~ていただけますか/ていただけませんか
[てform] + いただけますか/いただけませんか is a very polite way of asking someone for a favour. They are almost the same as [てform] + くださいますか/くださいませんか respectively.
~ばかり
~ばかり is another particle used to describe the extent of a condition but it used in a variety of meaning. Check example sentences here.
~ございます
ございます is a politer say of saying です or あります but it cannot be used after an いadjective. This post explains what you need to do to use it with an いadjective.
~ほど
~ほど is a particle for describing an extent of a condition. It’s often used in a negative sentence though it is possible to use it in an affirmative sentence.
~けっか、
けっか itself is a noun meaning “result” but ~けっか、 can be used like a conjunction meaning “as the result of ~, ….” This post has examples.
~こそ
~こそ is an expression for emphasis. It emphasises someone/something by selecting him/her/it over others. This post explains how it’s used.