Unit 20 :
JUST, ALREADY, and YET
現在完成式及過去簡單式2

Elementary

Summary

Present Perfect Tense& Simple Past Tense 2

Grammar Practice

They have just arrived.

until now

can use in “present perfect tense” and ”simple past tense” (only “negative” and “question”)

Negative

A：Are Oscar and Thomas here?

B：No, they haven’t arrived yet./ No, they didn’t arrive yet.

ALREADY

before you expected/ before I expected

can use in “present perfect tense” and ”simple past tense”

A：What time are Oscar and Thomas coming?

B : They’ve already arrived./ They already arrived.

It’s only 9:00 and Emily has already gone to bed./ Emily already went to bed.

A：Ryan, this is Jess.

B：Yes, I know. We’ve already met./ We already met.

YET

You can only use “Simple past tense” when mention about time

1. I lost my key yesterday. (not “I have lost”)

2. We bought a new car last week. (not “we have bought”)

3.A：Does Ian know that you’re going away?

    B：No, I haven’t told him yet./ No, I didn’t tell him yet.

4.Serena has bought a new dress, but she hasn’t worn it yet./ … she didn’t wear it yet.

Question

1.A：Have Oscar and Thomas arrived yet?/ Did Oscar and Thomas arrive yet?

    B：No, not yet. We’re still waiting for them

2. A：Has Ross started her new job yet?/ Did Ross start her new job yet.

    B：No, she’s starting next week.

3. A：This is my new dress.

    B：Oh, it’s nice. Have you worn it yet?/ Did you wear it yet?