Conjugation

Speed up

accélérer

Irregular verb, phrasal verb.

  • Phrasal verb: up

    Only speed changes; up stays the same: sped up, sped up.

  • Two forms

    The tables show sped up. Also correct: speeded up.

In speech, the helping verbs shorten: I’m, he’s, we’re, I’ve, I’ll, I’d.

Newbie

Enough to talk about now, the past, and your plans, and to give instructions.

  1. Present simple

    Habits, facts, and how things usually are. To say no or ask, add do or does: I don't speed up, he doesn't speed up.

    1. I / you / we / they speed up
    2. he / she / it speeds up

  2. Present continuous

    What is happening now, and plans already arranged: we’re leaving tomorrow.

    1. I am speeding up
    2. you / we / they are speeding up
    3. he / she / it is speeding up

  3. Past simple

    A finished action at a past time: yesterday, in 2020. To say no or ask, add did: I didn't speed up.

    1. I / you / he / she / it / we / they sped up

  4. Future with going to

    Plans and intentions, and what you can see coming: it’s going to rain.

    1. I am going to speed up
    2. you / we / they are going to speed up
    3. he / she / it is going to speed up

  5. Imperative

    Orders, advice, and instructions. Let’s suggests doing it together. To say no: don't speed up.

    1. (you) speed up
    2. let's speed up