~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.
~てくる
くる is a verb that means “to come” but てくる, which is a combination of the てform of a verb and the auxiliary verb くる can have various meanings.
~かわりに
~かわりに is used to mention an alternative. Also it can be used to mention 2 opposing facts as if one good side is making up for the other bad side or vise versa.
~くらい/ぐらい
~くらい or ~ぐらい is used to emphasize how trivial a condition is or to explain an extent of a situation/condition using an example.
~くせに/くせして
~くせに/くせして is usually translated as “although ~”, “despite ~”, etc. but it implies “criticism” or “reproach” against the other person’s action or status.
~くなる vs ~になる
なります is the most common word that describes a change from one state to another. Depending on what it turns into, the letter directly before that changes.
~きる
~きる is an auxiliary verb used after a verb stem and means “to finish ~ing completely/sufficiently” or “to reach a limit of ~ing”
~からなる
~からなる is an expression to mention something’s components. As being made of ~ is a condition that lasts for a while, it is often used in the form of ~からなっている.
~からには…
~からには… is used when the condition stated before からには will inevitably lead to the statement after it and often used to express the speaker’s resolution.
~からして
~からして is used to give an example to lead to your opinion or to state a strong base for your conviction. This post explains how it’s used.