30:17
STRUCTURE
2359 Views
01:56
READING COMPREHENSION &VOCABULARY
1307 Views
01:52
The Form of Irregular Verbs
1311 Views
01:59
The Tense of the Passive Voice
1391 Views
09:31
Changing from Active into Passive
1166 Views
07:20
The Form of the Passive Voice
1374 Views
03:29
What is the Passive Voice?
1414 Views
03:45
The Form of the Active Voice
1377 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1763 Views
03:20
Since vs For
1516 Views
04:50
Have or Has
1334 Views
00:49
Key Words: Present Perfect
3153 Views
09:03
The Use of the Present Perfect
1327 Views
03:08
Meaning and Form
1364 Views
02:40
Writing Formal Letters
1360 Views
03:10
Language Use
1953 Views
09:35
Parallel Structure
1506 Views
04:35
Prepositions of Instruments and Means
1342 Views
03:27
Polite Requests
1410 Views
06:30
May as a Modal of Permission and Request
1393 Views
04:11
Can as a Modal of Permission and Request
1221 Views
02:50
عناصر الاداء
1351 Views
03:45
شركة ستيرن
912 Views
01:15
مقياس القيمة المضافة
1147 Views
02:58
مقياس الربحية
1112 Views
02:39
معايير دركر
1263 Views
03:51
مقايس الاداء
1279 Views
01:41
اتخاذ اجراءات تصحيحية
982 Views
01:52
المرحلة الثانية من الرقابة
962 Views
02:49
مراحل الرقابة
2274 Views