1. Tenses 
 Present : Simple : S + V I + O He writes a letter
Continous : S + tobe + V ing + O He is writing a letter
Perfect : S + have/has + V III + O He has written a letter
Perfect Continous : S + have/has + been + V ing + O He has been writing a letter
 Past : Simple : S + V II + O He wrote a letter
Continous : S + tobe + V ing + O He was writing a letter
Perfect : S + had + V III + O He had written a letter
Perfect Continous : S + had + been + V ing + O He had been writing a letter
 Future : Simple : Simple : S + shall/will + V I + O He will write a letter
Continous : S + shall/will + be + V ing + O He will be writing a letter
Perfect : S + shall/will + have + V III + O He will have written a letter
Perfect Continous : S + shall/will + have + been + V ing + O He will have been writing a letter
 Past Future : Simple : S + should/would + V I + O He would write a letter
Continous : S + should/would + be + V ing + O He would be writing a letter
Perfect : S + should/would + have + V III + O He would have written a letter
Perfect Continous : S + should/would + have + been + V ing + O He would have been writing a letter
Febri 