30:17
STRUCTURE
2343 Views
01:56
READING COMPREHENSION &VOCABULARY
1285 Views
01:52
The Form of Irregular Verbs
1293 Views
01:59
The Tense of the Passive Voice
1375 Views
09:31
Changing from Active into Passive
1145 Views
07:20
The Form of the Passive Voice
1356 Views
03:29
What is the Passive Voice?
1395 Views
03:45
The Form of the Active Voice
1359 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1715 Views
03:20
Since vs For
1496 Views
04:50
Have or Has
1316 Views
00:49
Key Words: Present Perfect
3086 Views
09:03
The Use of the Present Perfect
1302 Views
03:08
Meaning and Form
1344 Views
02:40
Writing Formal Letters
1340 Views
03:10
Language Use
1934 Views
09:35
Parallel Structure
1489 Views
04:35
Prepositions of Instruments and Means
1321 Views
03:27
Polite Requests
1392 Views
06:30
May as a Modal of Permission and Request
1372 Views
04:11
Can as a Modal of Permission and Request
1185 Views
02:50
عناصر الاداء
1326 Views
03:45
شركة ستيرن
898 Views
01:15
مقياس القيمة المضافة
1121 Views
02:58
مقياس الربحية
1091 Views
02:39
معايير دركر
1243 Views
03:51
مقايس الاداء
1264 Views
01:41
اتخاذ اجراءات تصحيحية
963 Views
01:52
المرحلة الثانية من الرقابة
948 Views
02:49
مراحل الرقابة
2250 Views