Read each pattern and its example, then write your own sentence on the line.
〜てこそ V-て + こそ（後に肯定的な結果が来る）
Only by doing A does B become true — the action is presented as the essential condition. Emphatic and slightly formal, and the result that follows is positive.
自分で経験してこそ、その大変さが分かる。 Only by experiencing it yourself do you understand how hard it is.
〜としたら / 〜とすれば plain + としたら／とすれば／とすると
Sets up a hypothesis for discussion: supposing that A is the case, then B. Common in reasoning, planning and questions; neutral to slightly formal.
明日から一週間休めるとしたら、どこへ行きたいですか。 Supposing you could take a week off from tomorrow, where would you want to go?
〜にしたら / 〜にすれば N（人）+ にしたら／にすれば／にしてみれば
Presents a matter from a particular person's viewpoint, often with sympathy. Used with people, not things; にしてみれば is a common variant. Both spoken and written.
親にしたら、子どもの将来が心配なのは当然だ。 From a parent's point of view, worrying about a child's future is only natural.
〜ようでは plain + ようでは（N + のようでは、na-adj + なようでは）
If things stay in this state, a bad outcome will follow. It carries criticism or warning, so it is not aimed at a superior. Used in speech and writing.
こんな簡単な問題も解けないようでは、合格は難しい。 If you can't even solve a simple problem like this, passing will be hard.
〜わりに plain + わりに(は)（N + のわりに、na-adj + なわりに）
The result is unexpected given the standard mentioned: good for the price, calm for his age. Neutral and very common in everyday speech and writing.
この店は値段のわりに料理がおいしい。 For the price, the food at this restaurant is good.
〜にしては N ／ V plain + にしては
Judges something against the expectation attached to a label or fixed standard: for a beginner, for December. Close to わりに, but the standard is a definite category.
初めて作ったにしては、よくできている。 For a first attempt, it's very well made.