Questions- refer to the following case study:
Randy is teaching the fourth lesson in a thread about tenses. He has decided to illustrate the tenses for today's lesson by writing example sentences on the board, with key words highlighted to provide input enhancement. His high-beginner students will practice identifying each tense written, and then they will write sentences in each of the tenses covered, as well as change sentences from one tense to another.
Randy has chosen the following sentences to illustrate today's grammar lesson:
It rains here every day. It rained yesterday. It is raining today.
My cat watches the rain. It watched the rain yesterday. It is watching the rain today.
My sister plays in the rain. She played in the rain yesterday. She isplaying in the rain today.
My friends run in the rain. They ran in the rain yesterday. They arerunning in the rain today.
Question-
What additional vocabulary would best complement a lesson focusing on the simple present tense?
a. Time phrases beginning with "for" or "since"
b. Adverbs of frequency (sometimes, always, never, etc)
c. Prepositions of time and place (at, on, in, etc)
d. Participles (running, talked, swimming, etc)