Modals - 'can' and 'can't'

Active — user can report

คำแนะนำของผู้เขียน

Practise using the modals can and can't 

สำรวจแผ่นงาน

Present perfect vs simple past

Grammar - ESL

Contrast simple past vs present perfect

Zero, first and second conditional

Grammar - ESL

conditional: zero, first and second structure, exercises

Past Simple and Present Perfect

Grammar - ESL

Comparison of past simple and present perfect

Relative clauses

Grammar - ESL

difference between defining and non defining