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Choose the preposition from the relationship you can see. Use in for an enclosed space, on for a surface, at for a point or meeting place, under for a lower position, and between or next to for positions in relation to other things.
Use in for something inside an area or container, on for a surface, under for a lower position, above for a higher position, behind or in front of for direction, between for a position in the middle of two things, and next to for a position very close beside something.
Use in for something inside a space or container, on for contact with a surface, at for a point or activity place, under for a lower position, between for a middle position with two reference points, and beside for a close side position.
Use at with a precise point, on with a day or date, and in with a larger period. Use since to name when a situation began, and by to name the latest acceptable time.
Use at for a precise time, on for a day or date, and in for a longer period. For example, use at 8:00, on Saturday, and in July.
For a present continuous question, put am, is, or are before the subject. For a negative, put not after am, is, or are.
Use am, is, or are plus an -ing verb for an action happening now or around now, for a temporary situation, and for many changes in progress.
Make the present continuous with am, is, or are plus a verb ending in -ing. Use it for an action that is happening now or is temporary around the present time.
Use the present continuous when you want to show that something is in progress or temporary. Choose am with I, is with he, she, it, and singular nouns, and are with you, we, and they. Then add the -ing form of the main verb.
Use am, is, or are with an -ing verb for actions in progress now. This form also describes temporary situations happening around this week.
Choose the present continuous when you want to describe something in progress or temporary. Use am, is, or are before the verb ending in -ing.
Use the present simple for routines and general facts. Use am, is, or are plus a verb ending in -ing for an action in progress now or a temporary situation.