30:17
STRUCTURE
2440 Views
01:56
READING COMPREHENSION &VOCABULARY
1360 Views
01:52
The Form of Irregular Verbs
1373 Views
01:59
The Tense of the Passive Voice
1456 Views
09:31
Changing from Active into Passive
1226 Views
07:20
The Form of the Passive Voice
1429 Views
03:29
What is the Passive Voice?
1474 Views
03:45
The Form of the Active Voice
1425 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1895 Views
03:20
Since vs For
1574 Views
04:50
Have or Has
1388 Views
00:49
Key Words: Present Perfect
3275 Views
09:03
The Use of the Present Perfect
1392 Views
03:08
Meaning and Form
1439 Views
02:40
Writing Formal Letters
1426 Views
03:10
Language Use
2013 Views
09:35
Parallel Structure
1585 Views
04:35
Prepositions of Instruments and Means
1397 Views
03:27
Polite Requests
1493 Views
06:30
May as a Modal of Permission and Request
1475 Views
04:11
Can as a Modal of Permission and Request
1290 Views
02:50
عناصر الاداء
1392 Views
03:45
شركة ستيرن
962 Views
01:15
مقياس القيمة المضافة
1257 Views
02:58
مقياس الربحية
1156 Views
02:39
معايير دركر
1316 Views
03:51
مقايس الاداء
1324 Views
01:41
اتخاذ اجراءات تصحيحية
1021 Views
01:52
المرحلة الثانية من الرقابة
1022 Views
02:49
مراحل الرقابة
2375 Views