The answer depends on your meaning. If you mean that you tripped and hurt yourself as you walked to the store (i.e., on the sidewalk, before you arrived at the store), then Ranleen's answer works. You could also say it one of the following ways: "As I was going to the store..." "On my way to the store..." (this is more common) However, if you mean that you tripped and hurt yourself at the doorway to the store as you entered, then you would say it one of the following ways: "Upon entering the store..." (very formal) "As I entered the store..." "While going into the store..." "Going into the store..." "As I went into the store..." "On my way into the store..." In everyday speech, we would probably change the word order like this: "I tripped going into the store and sprained my ankle." "I tripped on my way into the store and sprained my ankle."

Your words are correct and clearly understood. However, to be grammatically correct, you should add a comma in the second sentence: "Whenever I drink it, I have a hard time falling asleep at night." There are two clauses. Each clause has a separate subject and verb: "I drink..." "I have..." When this is true, one must use a comma to separate the two clauses.

It is the opposite of "scruffy," just as in the previous line "young" is the opposite of "old." Literally, it means that someone or something has been rubbed firmly and for a long time with soap, water and a washcloth.

This is dialectical. It seems to be trying to convey the speech of someone who is from a particular area where people are less educated. This use of "when's it's" is usually British, indicating speakers from poorer areas. For instance, a similar dialect might read this way: "Them's the ones what took me bag." (Those are the people who took my purse.)

I'm a native English speaker (US). Here are some options to talk about future plans: "My buddy's GONNA train me." (Very informal) "My buddy's GOING TO train me." (Informal) "I SET UP a training with my buddy." (Informal) "I LINED UP a training with my buddy." (Informal) "I NAILED DOWN a training with my buddy." (Informal) "I BOOKED a training with my buddy." (Informal to medium-formal) "I SCHEDULED a training with my buddy." (Medium formality)

Некоторые слова не имеют формы единственного числа, например, «брюки» или «ножницы». То же самое и в английском: "pants", "scissors", и т. д. (на букву "s"). «Трусы» - это такое слово.

It means clothing made especially for pregnant women (usually to be more comfortable while still being fashionable).

In this context, "to pitch" means to try to convince someone of something, as one might do when trying to get a new customer to buy a product. It implies that a rehearsed speech was given with lots of details about why it all makes sense and why the reasons should be believed by Koch and Pestryakov. But it is also implied here that the speaker does not entirely believe whatever was told to Koch and Pestryakov; the speaker may believe that Koch and Pestryakov are being easily conned/deceived.