a. We use ‘for’ to say how long. (e.g. We have been waiting for twenty minutes.)
1. use ‘since’ with the present perfect or the past perfect to say when something started. (e.g. I have worked here since December.)
2. use ‘from ~ to/ until’ to say when something starts and finishes. (e.g. They stayed with us from Monday to Friday.)
b. We use 'still' to show that something continues up to a time in the past present or future. It goes in front of the main verb. (e.g. The children still enjoyed playing games.) or after the present simple or the past simple of be. (e.g. Her grandfather is still alive.)
1. use 'already' to show that something has happened sooner than it was expected to happen. Like still, it comes before the main verb. (e.g. The car is OK. I’ve already fixed it.) or after the present simple or past simple of the verb be. (e.g. It was early but we were already tired.)
2. use 'yet' in a negative or interrogative clause, usually with perfective aspect (especially in British English), to show that something has not happened by a particular time. 'yet' comes at the end of the sentence. (e.g. It was late, but they hadn’t arrived yet.)
Idiom 365
Smell Something Fishy: something about a person or situation arouses suspicion
Example: It smells fishy. We do not have any benefit from it.