～たことにする a pattern used to intentionally make a false statement about something in the past: “not actually ～ but I will pretend ～.”
～だけじゃなく/～だけでなく
～だけじゃなく (casual) / ～だけでなく (formal) means “not only ～” so inevitably a “but also” part which is indicated with the particle も follows.
～てごらん（なさい）
～てごらん or ～てごらんなさい is a gentle way to suggest an action to somebody who is junior to you such as your children, students, etc.
～たきり・・・（ない）
～たきり・・・（ない） means after the action of the たform verb is completed the condition described in the second half of the sentence is continuing.
～たいものだ/～たいものです
～たいものだ/～たいものです is a variation of ～たい（です） but it is used for a wish that is difficult to fulfill or something you have longed for for a long time.
～そうにみえる
～そうにみえる is used to describe your own opinion based on the appearance of somebody else or an external condition. Check more example sentences here.
～そうになる/そうになった
～そうになる is used when something out of a speaker’s control is about to happen. Ｉt is often used in the past tense to describe something that almost happened.
～そうにない/そうもない/そうにもない
～そうにない, ～そうもない and ～そうにもない are used when you describe something that is unlikely to happen. This post explains how to use them and subtle differences among them
～そうにする/～そうにしている
～そうにする/～そうにしている means “to look ～” or “to seem ～”. ～そうにする/～そうにしている follows an adjective stem which describes a person’s feeling or sense.
～だけでは…ない
～だけでは…ない is an expression for saying ～ is not sufficient to get an expected result. A potential (form) verb is often used in the latter half.
～ごとに
～ごとに follows a noun or a dictionary form verb and means “every ～” or “every time ～.” Differences between ～ごとに and ～たびに are explained at the bottom of this page.
～させてください/～させてくださる
～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.
