Present perfect, modais e first conditional

1.I ______________ (finish) my homework already.

2.She ______________ (never / travel) abroad.

3.They ______________ (study) English for three years.

4.We ______________ (not see) that movie yet.

5.He ______________ (just / arrive) home.

1.It's a school rule: students …mustshouldmightmust not______________ wear a uniform.

2.Take an umbrella, just in case. It …mustshouldmightmust not______________ rain later.

3.You …mustshouldmightmust not______________ cheat during a test.

4.If you want better grades, you …mustshouldmightmust not______________ study more.

5.I'm not sure, but she …mustshouldmightmust not______________ come to the party.