You should submit this sort of question in the note section so that in case if there are errors, we can show them to you more clearly by using coloring schemes. The first one is correct except if you use punctuation correctly otherwise you must write it in a different form. Let's have a dictation -- this way we'll be able to check our knowledge of language. or Let's have a dictation this way; we'll be able to check our knowledge of language. The way the sentence puncutates gives different meanings. Without added punctuation, the sentence can be written as, Let's have a dictation this way SO THAT we'll be able to check our knowledge of language.. 2. Grammatically correct but sounds rather convoluted. Don't walk barefoot on the grass, else your feet might get pricked by thorns. 3. This sentence is fine. There are other shorter ways but then they are not part of you question.

1. Let's have a dictation exercise. This way we will be able to check our knowledge of the language. (It is assumed that the dictation will be in a specific language to test that language. You are not testing "language" generally, that is, the ability to communicate but a specific one. This is why you need the article "the" before "language.") 2 OK 3. Is there a restaurant near here? Is there a restaurant around here? Is there restaurant nearby/somewhere nearby?

Third can be like: Is there any restaurant?